

It was practically like having your most important files in Finder on your computer – but everywhere. iDisk allowed you to store documents, pictures, QuickTime files, and PDFs in one cloud-based “drive.” This was accessible on all of your Apple products as well as at me.com on a PC. If there are files on your iOS device still waiting to be automatically uploaded to your Dropbox cloud account, the Dropbox app will pick up where it left off, and resume uploading them.Before Dropbox became popular, there was iDisk, which was Apple’s cloud storage system. Then re-link your iOS device to your Dropbox account, at the bottom of the Dropbox app's Settings page. Your Dropbox cloud files will remain on the cloud-the only effect (that I know of-your mileage may vary) will be to clear the Dropbox cache on your iOS device. The quickest way to delete the stuck Dropbox app cache files from your iOS device is to open the Dropbox app, select its Settings button, scroll to the bottom of the Settings page, and select the "Unlink" option.

Contrary to Dropbox tech support, under these (or some other mysterious) situations, quitting from the app won't always clear these particular "stuck" sandboxed/cached files, though the cached copies of subsequent files that you view or upload will be deleted from your iOS device when you quit from the Dropbox app. Dropbox tech support seems reticent to acknowledge this, so I haven't been able to find out the actual causes for this problem, but some users have speculated that possibly if a Dropbox sync operation is interrupted, it might prevent the app from releasing the cached copies of your files that were in the Dropbox cache at the time (Dropbox needs to temporarily cache your cloud files locally on your iOS device to allow you to view them, and is supposed to delete them when you quit from the Dropbox app). There is a situation which can cause the Dropbox iOS app to retain cached duplicates of your files on your iOS device even if you haven't favorited them, eventually using up a lot of space. Hello from the far-flung world of March 2014, where we finally have jet packs, flying cars, and electric toothbrushes, and everyone knows the answers to every iteration of old questions.
