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600K Files and a $500 Drive: How Apple's API Broke Dropbox
I've been a Dropbox user for nearly 20 years. I'm writing this after days of troubleshooting, a brand new 24TB external drive I had to buy for $500, and a workflow that is still not fully restored.
How it started
It began with a routine reorganization — moving files across some large directories. Dropbox simply stopped syncing. It froze. No error message, no clear indication of what went wrong. I contacted Dropbox support. We exchanged multiple messages. Despite their good intentions, they were unable to help me resolve it.
So I went down the path of solving it myself.
What I tried
After exhausting every troubleshooting option I could find, I made the decision to do a full Dropbox removal. I bought a 24TB external drive, moved all my files there as a safety net, and did a clean reinstall of Dropbox from scratch.
The new installation runs on the File Provider API. That's when the real problem started.
The File Provider trap
After the clean install, Finder no longer recognized the Dropbox folder as a proper Dropbox directory. No Online Only / Local controls. No sync icons. Just a folder full of zero-byte files I couldn't open or work with.
The reason: I have over 600,000 files. The File Provider migration requires under 300,000 files to grant eligibility. So I'm permanently stuck in legacy mode — which has no mechanism to force-download folders in bulk. Every file only downloads when opened individually. For a software engineer trying to work with a project containing 22,000 files, that's completely unusable.
I tried everything:
- Full uninstall and clean reinstall multiple times
- Clearing all CloudStorage domains via Terminal
- touch, cat, cp to /dev/null, brctl download — none work in legacy mode
- Killing conflicting File Provider extensions from OneDrive and Google Drive helpers
- Multiple Selective Sync configurations
- Each test took hours because of the file volume
The double failure
This is a failure on two fronts.
Apple forced every cloud storage provider onto the File Provider API without adequate consideration for power users with large libraries. The 300,000-file eligibility cap is arbitrary and punishes exactly the users who rely on Dropbox most. brctl download — the only CLI tool to force file downloads — only works inside /Library/CloudStorage, making bulk downloads impossible in legacy mode.
Dropbox had years to prepare its users for this transition. There was no clear communication that users with large libraries would lose core functionality. No migration path for people with 500K+ files. No bulk download tool. No fallback. Just a quiet "you are not eligible" message that leads to a dead end.
Where I am now
I'm currently downloading my active project folders locally and moving them to an external drive. My plan is to do a serious cleanup — get below 300,000 files — and see if that finally makes the File Provider work properly. If it does, great. If not, I'll migrate to Google Drive. Not because it's better, but because at least there's no expectation gap.
If anyone has gone through this and found a way out, I'd love to hear it. I'm a software engineer. I've tried everything I can think of. And I'm genuinely stuck.
To other users with large libraries
If you have more than 300,000 files and are seeing the "not eligible" message, the only viable path right now is Selective Sync to reduce your active file count. There is no CLI workaround. There is no bulk download tool in legacy mode. Plan for hours of sync time per attempt.
I hope this saves someone the days I lost.
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