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Does Apple Have a Dropbox Equivalent? (w/Examples) + FAQs

Yes, Apple has a Dropbox equivalent, and it is called iCloud Drive. iCloud Drive is Apple’s native cloud storage and file-sync service that ships inside macOS, iOS, iPadOS, and the web, and it performs the same core jobs Dropbox performs: storing files in the cloud, syncing them across devices, and sharing them with other people.

The service sits inside a larger family called iCloud+, which bundles storage with privacy tools like Private Relay, Hide My Email, and custom email domains. Apple also layers on Advanced Data Protection for iCloud, which turns on end-to-end encryption for iCloud Drive when the user opts in, a feature Dropbox does not offer for standard consumer accounts.

Roughly 68% of U.S. consumers use some form of personal cloud storage, and Apple’s installed base of more than 2.2 billion active devices makes iCloud Drive the largest native alternative to Dropbox on the planet. That scale matters, because the right choice between the two affects privacy, cost, legal exposure, and the simple question of whether your files open when you need them.

Here is what this guide covers:

  • ๐ŸŽ How iCloud Drive, iWork, Shared Albums, AirDrop, and Apple Business Manager line up against Dropbox
  • ๐Ÿ’ฐ A plan-by-plan price and feature comparison using April 2026 U.S. pricing
  • โš–๏ธ The U.S. legal angles that matter: HIPAA BAAs, CCPA/CPRA, GDPR spillover, and lawful access requests
  • ๐Ÿง‘โ€๐Ÿ’ป Three named real-world scenarios that show when Apple wins and when Dropbox wins
  • ๐Ÿšซ The seven most common mistakes people make when switching clouds, and how to dodge each one

The Core Answer: iCloud Drive Is Apple’s Dropbox

iCloud Drive is the single Apple product that maps most cleanly to Dropbox. Both services give you a folder on your computer that mirrors a folder in the cloud, and both sync changes to every signed-in device within seconds. The experience on a Mac is nearly identical to the experience on a Windows PC running the Dropbox desktop app, except that iCloud Drive lives inside Finder and the Files app rather than as a separate program.

The plain-English explanation is simple: a cloud drive is a shared folder that lives on a remote server and copies itself to every device you own. The consequence of not using one is that files get stranded on a single laptop, and if that laptop dies, the files die with it. A real-world example is Maya, a freelance photographer in Austin, who lost three weddings worth of RAW files when her MacBook was stolen in 2024, and who now keeps every shoot inside iCloud Drive so the photos survive any single hardware loss.

A common misconception is that iCloud Drive is only for Apple apps like Pages or Numbers. In reality, any file type works, and the service exposes a standard folder that third-party apps like Adobe Lightroom, Microsoft Word, and Figma write to directly. The other common misconception is that iCloud Drive does not work on Windows, but iCloud for Windows has shipped since 2012 and now includes Files On-Demand behavior similar to Dropbox’s Smart Sync.

What “Dropbox Equivalent” Really Means

To call something a Dropbox equivalent, it must do five things: store files remotely, sync them across devices, share them with links or invitations, support selective offline caching, and survive a device loss. iCloud Drive checks every box, and so does Google Drive, Microsoft OneDrive, Box, and pCloud. The differences sit in price, privacy posture, collaboration depth, and platform reach.

The consequence of picking the wrong equivalent is friction. If you collaborate with Windows-first teams, iCloud Drive’s web app feels thinner than Dropbox’s. If you live entirely inside Apple hardware, Dropbox’s separate app and separate account feel like busywork. David, a solo attorney in Miami, tried to run his practice on iCloud Drive but kept hitting clients who emailed him Dropbox links, and he ultimately pays for both.

The Wider Apple File Ecosystem

iCloud Drive is the headline product, but Apple ships several narrower tools that handle jobs Dropbox also handles. Shared Albums replace Dropbox photo folders for families, AirDrop replaces Dropbox Transfer for one-shot handoffs between nearby Apple devices, and iWork collaboration replaces Dropbox Paper for live co-editing of documents, spreadsheets, and slides.

The consequence of ignoring these narrower tools is that people overpay for Dropbox features they already own inside iCloud+. Priya, a product manager at a 50-person startup in San Francisco, cut her team’s Dropbox Professional seats after she realized AirDrop and Shared Albums covered 80% of the team’s internal file handoffs. The remaining 20% stayed on Dropbox because her Windows-based contractors could not install iCloud for Windows on their locked-down corporate laptops.

Pricing and Plans Side by Side (April 2026, U.S.)

Cloud storage pricing moves often, and the April 2026 U.S. rack rates show iCloud+ slightly undercutting Dropbox at the consumer tier and matching it at the power-user tier. The iCloud+ pricing page and the Dropbox plans page are the sources that govern any numbers below.

The plain-English explanation is that both services sell storage by the gigabyte, with extra features bolted on at higher tiers. The consequence of overbuying is obvious: wasted money. The consequence of underbuying is worse, because once your cloud fills up, new photos stop backing up, and you usually do not notice until a device dies.

iCloud+ vs. Dropbox Plan Comparison

Plan TieriCloud+ (April 2026 U.S.)Dropbox (April 2026 U.S.)
Free5 GB, included with any Apple ID on the iCloud free tier2 GB, listed on the Dropbox Basic page
Entry paid50 GB for $0.99/monthPlus: 2 TB for $11.99/month
Family tier200 GB for $2.99/month, shareable with Family SharingFamily: 2 TB for $19.99/month, up to 6 users
Power user2 TB for $9.99/monthEssentials: 3 TB for $19.99/month
Heavy creator6 TB for $29.99/monthProfessional: 3 TB with eSignature at $24.99/month
Max tier12 TB for $59.99/monthBusiness Advanced: 15 TB+ pooled at $24/user/month

A real-world example is Priya’s team, which moved six contractors from Dropbox Essentials at $19.99 each to a single iCloud+ 2 TB plan shared through Family Sharing at $9.99, saving roughly $110 per month. The misconception she had to unlearn was that Family Sharing requires actual family members; in practice, Apple only requires that the organizer agree to cover purchases, and the Family Sharing terms do not police biological relationships.

Feature-by-Feature Breakdown

The headline features users shop on are sync speed, selective sync, file versioning, sharing controls, collaboration, and cross-platform reach. iCloud Drive and Dropbox split these categories, and neither one wins every round.

The plain-English explanation is that Dropbox was built cloud-first for every operating system, while iCloud Drive was built Apple-first and later extended to Windows and the web. The consequence is that Dropbox feels more neutral on mixed-OS teams, and iCloud Drive feels more invisible on all-Apple teams.

Sync, Offline, and File On-Demand

Both services support a “download only when I open it” mode. Dropbox calls it Smart Sync, and Apple calls it Optimize Mac Storage. The consequence of turning either one off is that your entire cloud must fit on your local drive, which is impossible for most users with multi-terabyte plans.

A real example is Maya, whose 14-inch MacBook Pro has a 512 GB SSD but whose iCloud Drive holds 3.8 TB of photos. Without Optimize Mac Storage, her Mac would refuse to sign in to iCloud. The common misconception is that “optimized” files are safe when the internet is out; they are not, and a flight with no Wi-Fi will leave any non-pinned file unreadable.

Versioning and File Recovery

Dropbox keeps 30 days of file history on free and Plus plans, 180 days on Essentials and Business, and 365 days on Business Advanced. iCloud Drive keeps 30 days of deleted-file recovery and unlimited version history for iWork documents only.

The consequence of this gap is real. If a ransomware attack encrypts a Dropbox Business Advanced account, the admin can rewind the entire account up to a year. On iCloud Drive, a mass-encryption event older than 30 days is permanent. David, the Miami attorney, keeps client files on Dropbox specifically because malpractice carriers often require at least 90 days of versioned backups, and iCloud Drive cannot meet that baseline.

Sharing and Link Controls

Dropbox lets you password-protect links, set expiration dates, disable downloads, and watermark previews on paid plans. iCloud Drive lets you choose “anyone with the link” or “only people you invite,” and you can set view-only or edit permissions, but password and expiration controls only exist on iWork shares, not generic files.

The consequence is that high-stakes sharing often forces iCloud users to email a Dropbox link instead. The misconception is that iCloud’s end-to-end encryption protects shared links; it does not, because shared content on iCloud Drive falls back to standard encryption whenever non-Apple devices or non-Apple users are involved.

Collaboration

Dropbox’s native collaboration product is Dropbox Paper, which is lightweight relative to Google Docs. Apple’s collaboration runs inside Pages, Numbers, and Keynote, and it supports real-time co-editing with up to 100 participants per document.

The consequence of picking Apple’s tools is that non-Apple collaborators must use iCloud.com in a browser, which lacks many advanced features and blocks some corporate networks. The consequence of picking Paper is that it feels orphaned, because Dropbox has repeatedly signaled it is not a core investment area.

Cross-Platform Reach

Dropbox ships native apps for macOS, Windows, Linux, iOS, Android, and several Linux distributions. iCloud Drive ships native apps for macOS, iOS, iPadOS, and Windows, plus a web app at iCloud.com, but there is no Android app and no Linux client.

The consequence of iCloud’s gaps is visible on mixed-device teams. Priya’s Android-using contractors had to upload files through a browser, which capped single-file uploads at 50 GB on iCloud.com and lacked background sync entirely. Dropbox’s Android app handled the same job in the background with no size cap up to the plan’s total.

Privacy, Encryption, and U.S. Legal Exposure

Cloud storage is a regulated activity whenever it touches regulated data, and both iCloud Drive and Dropbox trigger specific U.S. rules when used for health, financial, education, or children’s data. The plain-English explanation is that the cloud provider is often a “service provider” or “business associate” under these laws, and the customer stays on the hook for compliance.

The consequence of ignoring the rules is serious, because HIPAA civil penalties reach $2,134,831 per violation category per year under the 2025 HHS adjustments, and CCPA statutory damages run $100 to $750 per consumer per incident under California Civil Code ยง1798.150.

HIPAA and Business Associate Agreements

Any health-care provider, plan, or clearinghouse that stores protected health information in the cloud must sign a Business Associate Agreement with the vendor. Dropbox offers a standard BAA on Business and Business Advanced plans. Apple does not publicly offer a BAA for iCloud, and Apple’s guidance directs regulated health-care customers to avoid storing PHI in iCloud.

The consequence is that a solo dentist cannot legally use iCloud Drive for patient records. David, the Miami attorney, keeps medical-malpractice client files on Dropbox Business precisely because he needs the BAA to accept intake documents from physician clients. The misconception is that Apple’s end-to-end encryption satisfies HIPAA; it does not, because HIPAA requires contractual terms, not only technical safeguards.

CCPA, CPRA, and State Privacy Laws

Under the California Privacy Rights Act, a cloud vendor that processes personal information on behalf of a business is a “service provider,” and the business must have a written contract that limits the vendor’s use of the data. Dropbox publishes a standard Data Processing Addendum that maps to CPRA, and Apple offers a parallel iCloud Business Data Processing Agreement on Apple Business Manager accounts only.

The consequence of skipping the DPA is that a business can face enforcement from the California Privacy Protection Agency, which levied its first public fines in 2024 against Sephora and DoorDash predecessor matters. Fifteen additional states, including Virginia, Colorado, and Texas, now have similar laws on the books.

GDPR Spillover for U.S. Companies

U.S. companies that serve EU residents fall under the General Data Protection Regulation, and cloud vendors are “processors” under Article 28. Both Dropbox and Apple publish processor-level commitments and rely on EU-U.S. Data Privacy Framework self-certification for lawful data transfers.

The consequence of non-compliance is a fine of up to 4% of global annual revenue. The misconception is that storing EU data on U.S. servers is illegal. It is not, provided the vendor is DPF-certified or the customer signs Standard Contractual Clauses.

Law-Enforcement Access

Both vendors publish transparency reports. The Apple Transparency Report shows Apple received more than 32,000 U.S. government device requests in its most recent period, and Dropbox’s transparency report shows similar volume at smaller scale. A Stored Communications Act warrant or subpoena can compel either vendor to hand over customer content.

Advanced Data Protection changes the math for iCloud. When a user enables it, Apple loses the ability to decrypt iCloud Drive contents, and law enforcement receives only metadata. The Carpenter v. United States, 585 U.S. 296 (2018) ruling established that cloud-held data can carry Fourth Amendment protection, but a valid warrant still compels production of whatever the provider can actually decrypt.

Three Real-World Scenarios

Scenarios show how the abstract differences collapse into concrete decisions. Every person below is a fictional composite built from the patterns above.

Scenario 1: Maya the Freelance Photographer

SituationOutcome
Maya shoots weddings on a Sony camera and edits on a 14-inch MacBook Pro, producing 80 GB per wedding and storing everything in iCloud+ 6 TB.She pays $29.99/month, uses Optimize Mac Storage to keep only recent shoots on the SSD, and delivers client galleries through iCloud.com shared links with view-only permissions.
A client on Windows demands a Dropbox link because corporate IT blocks iCloud.com.Maya pays an extra $11.99/month for Dropbox Plus and uses it as a delivery-only layer, uploading finished JPEGs and keeping RAW archives in iCloud Drive.

Scenario 2: David the Solo Attorney

SituationOutcome
David handles medical-malpractice cases and must store PHI under a BAA.He uses Dropbox Business at $24/user/month, signs the standard BAA, and turns on Dropbox Rewind for 365-day ransomware recovery.
He still wants the Apple ecosystem for personal files and Family Sharing.He keeps iCloud+ 2 TB at $9.99/month for photos, Notes, and personal documents, and keeps all client work strictly inside Dropbox.

Scenario 3: Priya the Startup PM

SituationOutcome
Priya’s 50-person startup runs half on Macs and half on Windows, with three Android contractors.She standardizes on Dropbox Business Advanced at $24/user/month because iCloud Drive has no Android app and limited Windows-admin tooling.
Internal Apple-only teams still use AirDrop and Shared Albums for quick handoffs.Those tools cost nothing extra, so Priya treats iCloud as free “last-mile” transport and reserves Dropbox for system-of-record storage.

Named Examples Across Use Cases

Maya, David, and Priya show the three most common split-stack patterns. The first pattern is “iCloud-first with Dropbox as a delivery ramp,” which fits creators who live inside Apple hardware but serve outside clients. The consequence of choosing this pattern is low monthly cost and minimal app switching, at the price of maintaining two accounts.

The second pattern is “Dropbox-first with iCloud for personal,” which fits regulated professionals. The consequence is higher cost, because Business plans start at $24/user/month, but the BAA and 365-day version history justify the spend. David’s malpractice carrier explicitly requires both controls, and the ABA’s cloud-computing ethics opinion requires reasonable efforts to prevent unauthorized disclosure under Model Rule 1.6(c).

The third pattern is “Dropbox-first with iCloud for free tooling,” which fits mixed-OS teams. The consequence is that the company pays for one real cloud and gets AirDrop, Shared Albums, and Handoff as bonuses on the Apple half of the team. Priya’s team saves roughly $700 per month versus putting everyone on Dropbox Professional individually.

Mistakes to Avoid

  1. Turning off iCloud Drive to “free up space” without moving files first. The consequence is that files in the iCloud Drive folder stop syncing and can be deleted on the next sign-out, because macOS treats them as cloud-only once the service is disabled.
  2. Enabling Advanced Data Protection without saving a recovery key. The consequence is total, permanent data loss if you lose every trusted device, because Apple cannot recover the account.
  3. Using iCloud Drive for PHI without a BAA. The consequence is a HIPAA violation at up to $2.1 million per category per year, because Apple does not sign BAAs for iCloud.
  4. Sharing a Dropbox link without setting an expiration date. The consequence is that old links keep working forever, and former employees or ex-clients retain access long after the relationship ends.
  5. Relying on iCloud’s 30-day deletion window for ransomware recovery. The consequence is that a slow-burn ransomware attack that sits for 31 days wipes out your recovery, because iCloud Drive lacks Dropbox’s 180- or 365-day rewind.
  6. Assuming Family Sharing shares files. The consequence is confusion, because Family Sharing shares the storage pool and purchases but keeps each user’s iCloud Drive contents private by default.
  7. Storing a single master copy in one cloud. The consequence is a single point of failure, because both services have had multi-hour outages, and the 3-2-1 backup rule from CISA still applies.
  8. Forgetting that iCloud for Windows requires admin rights to install. The consequence is that locked-down corporate laptops cannot run it, which blocks many Windows-first teams from adopting iCloud Drive.
  9. Sharing iWork documents and expecting non-Apple users to edit them natively. The consequence is that Windows and Android collaborators must use iCloud.com in a browser, which drops features and breaks offline workflows.

Do’s and Don’ts

Do’s

  • Do enable two-factor authentication on both accounts, because it is the single highest-leverage control against account takeover and is required to turn on Advanced Data Protection.
  • Do turn on Advanced Data Protection for iCloud if you do not need BAAs or shared-link passwords, because it removes Apple’s ability to hand over your content under a warrant.
  • Do keep a local Time Machine or external backup, because cloud sync is not backup and propagates deletions to every device within seconds.
  • Do audit shared links every quarter, because both services accumulate forgotten links that quietly expose client data long after projects close.
  • Do use Apple Business Manager for iCloud at work, because it unlocks DPAs, managed Apple IDs, and admin controls that consumer iCloud lacks.

Don’ts

  • Don’t store PHI, EDI 837 claims, or student records on personal iCloud, because HIPAA, HITECH, and FERPA all require contractual safeguards Apple does not provide at the consumer tier.
  • Don’t share full iCloud Drive folders with “anyone with the link”, because the link leaks via email forwarding and search indexing.
  • Don’t disable Optimize Mac Storage on small SSDs, because your Mac will run out of space and stop syncing silently.
  • Don’t assume Dropbox Basic keeps files forever, because Dropbox deactivates Basic accounts after 12 months of inactivity and deletes data thereafter.
  • Don’t mix personal and work data in one account, because a legal hold or subpoena on the work data can sweep in personal files.

Pros and Cons

iCloud Drive Pros

  • Native Finder and Files integration means zero extra apps on Apple hardware.
  • Advanced Data Protection delivers consumer-grade end-to-end encryption Dropbox does not match.
  • Family Sharing splits storage across six people for a single monthly fee.
  • iWork co-editing is free and unlimited on every iCloud+ plan.
  • Storage-tier pricing undercuts Dropbox at the 2 TB level by roughly $2/month.

iCloud Drive Cons

  • No Android or Linux clients cut off mixed-device teams.
  • No public Business Associate Agreement blocks regulated health-care use.
  • Only 30 days of deletion recovery falls short of malpractice-carrier and ransomware standards.
  • Sharing controls lack password and expiration on non-iWork files.
  • Windows client requires admin rights, which locked-down corporate IT often refuses.

Dropbox Pros

  • Works identically on macOS, Windows, Linux, iOS, and Android.
  • Standard BAA on Business plans covers HIPAA-regulated workloads.
  • Rewind restores entire accounts up to 365 days after a ransomware or mass-deletion event.
  • Granular sharing controls include passwords, expirations, and download disables on paid plans.
  • Integrations with Slack, Zoom, and hundreds of SaaS apps ship out of the box.

Dropbox Cons

  • Consumer pricing is higher than iCloud+ at the 2 TB tier by roughly $2/month.
  • End-to-end encryption is limited and not the default.
  • Dropbox Paper has seen minimal investment and feels stagnant next to Google Docs.
  • Basic free plan caps at 2 GB versus iCloud’s 5 GB.
  • Separate account and app on Apple hardware creates friction for all-Apple users.

Step-by-Step: Switching From Dropbox to iCloud Drive

The core process has six steps, and each step has nuances that change the outcome. The plain-English explanation is that you copy, verify, point apps at the new location, and only then delete the old copy. The consequence of skipping verification is permanent data loss.

Step 1: Audit Your Dropbox

Open the Dropbox desktop app, right-click the system-tray icon, and choose Preferences, then Sync. Confirm every folder is set to “Available offline” or download each folder manually through the web. The nuance is that Smart Sync placeholders do not copy file contents; they only copy pointers, so a naive drag-and-drop moves empty shells.

Step 2: Expand Your iCloud+ Plan

Go to System Settings, Apple ID, iCloud, Manage, and choose a plan that fits your total Dropbox usage plus 20% headroom. The consequence of buying too small is that the copy fails partway through, and the consequence of buying too big is wasted money, which you can reverse at the next billing cycle.

Step 3: Drag Files Into iCloud Drive

Open Finder, select the Dropbox folder in the sidebar, select all, and drag into iCloud Drive. The nuance is to use Option-drag to copy rather than move, because moving deletes from Dropbox the instant the copy queues, before verification.

Step 4: Verify Upload Completion

Right-click any top-level folder inside iCloud Drive and choose “Remove Download” to force a re-download. If every file returns, the upload is complete. The consequence of skipping this step is that iCloud may show files that only exist locally and will vanish when the Mac is lost.

Step 5: Re-Point Third-Party Apps

Apps like 1Password, Scrivener, and BBEdit store libraries inside the cloud folder. Open each app’s preferences and re-point the library path to the new iCloud Drive location.

Step 6: Cancel Dropbox Only After 30 Days

Keep the Dropbox account active for at least 30 days after the migration, because you will find missed files. After 30 days, sign in to Dropbox on the web, download a final archive, and cancel the subscription.

Key Entities and How They Relate

Apple Inc. is the vendor that operates iCloud Drive, and Apple Inc. v. FBI in 2016 established the company’s public stance on lawful-access resistance. Dropbox, Inc. is the vendor that operates Dropbox and has been publicly traded since its 2018 IPO. The Federal Trade Commission enforces unfair and deceptive practices claims against both vendors under Section 5 of the FTC Act.

The U.S. Department of Health and Human Services Office for Civil Rights enforces HIPAA against covered entities and business associates, and it has published cloud-computing guidance that directly addresses BAAs with cloud vendors. The California Privacy Protection Agency enforces the CCPA and CPRA, and the European Data Protection Board coordinates GDPR enforcement across EU member states.

The Cybersecurity and Infrastructure Security Agency publishes the 3-2-1 backup guidance that informs how both iCloud Drive and Dropbox should fit into a total data-protection strategy. The National Institute of Standards and Technology publishes SP 800-171 and SP 800-53, which government contractors must follow when choosing any cloud vendor.

Court Rulings That Shape Cloud Storage

Carpenter v. United States, 585 U.S. 296 (2018) extended Fourth Amendment protection to cell-site location information and, by analogy, to other long-term cloud-held records. The consequence is that warrants, not subpoenas, are generally required for content of cloud storage older than 180 days, narrowing a loophole in the Stored Communications Act.

Riley v. California, 573 U.S. 373 (2014) held that police must get a warrant to search a cell phone on arrest, and its reasoning extends to cloud accounts linked to that phone. United States v. Microsoft, 584 U.S. 236 (2018) was mooted by the CLOUD Act, which now governs cross-border government access to cloud data held by U.S. providers like Apple and Dropbox.

FAQs

Is iCloud Drive exactly the same as Dropbox?

No. iCloud Drive and Dropbox overlap on core sync and share features, but they differ on BAAs, Android support, version history length, and link controls, so the right fit depends on your workload.

Can I use iCloud Drive on Windows?

Yes. Apple publishes iCloud for Windows on the Microsoft Store, and it supports Files On-Demand behavior similar to Dropbox Smart Sync, though it requires admin rights to install.

Does iCloud Drive work on Android?

No. Apple does not ship an Android client, and Android users must access iCloud Drive through iCloud.com in a browser, which lacks background sync and caps uploads.

Is iCloud Drive HIPAA compliant?

No. Apple does not offer a Business Associate Agreement for iCloud, so health-care providers cannot lawfully store protected health information in iCloud Drive under HIPAA.

Does Dropbox offer end-to-end encryption?

No. Dropbox encrypts files at rest and in transit but holds the keys, so it can decrypt content under a lawful-access order, unlike iCloud with Advanced Data Protection enabled.

Can I share a file stored in iCloud Drive with a Dropbox user?

Yes. You generate an iCloud share link at iCloud.com and paste it into any email or chat, and the Dropbox user opens it in a browser without needing an Apple ID for view-only shares.

Is iCloud+ cheaper than Dropbox?

Yes. At the 2 TB tier, iCloud+ costs $9.99/month in April 2026 versus Dropbox Plus at $11.99/month, and Family Sharing splits that bill across six users at no extra cost.

Does Advanced Data Protection cover shared iCloud Drive files?

No. Shared content falls back to standard encryption whenever non-Apple users or non-Apple devices participate, so end-to-end protection only applies to private content.

Can I recover a file I deleted from iCloud Drive last month?

No. iCloud Drive keeps deleted files for only 30 days, so anything older than that is permanently gone, while Dropbox Business Advanced keeps deleted files for up to 365 days.

Is my data in iCloud Drive subject to U.S. government requests?

Yes. Apple can receive Stored Communications Act warrants and subpoenas, but Advanced Data Protection limits what Apple can hand over to metadata only for content stored under that setting.

Can I use both iCloud Drive and Dropbox at the same time?

Yes. Many users run both, keeping personal files in iCloud and regulated or cross-platform files in Dropbox, and macOS shows both as top-level folders in Finder without conflict.

Does iCloud Drive support file versioning like Dropbox?

No. iCloud Drive only keeps unlimited version history for iWork documents, while Dropbox keeps 30 to 365 days of version history for every file type depending on plan tier.