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iPad Files app not showing Dropbox folders and how I managed to solve this.
In working with a new iPad, I discovered that the Files app was not correctly connecting with Dropbox. No Dropbox folders showed up either in the Files app or in any other app with an open feature that would normally have been able to access Dropbox files. Oddly, when I clicked “Dropbox” in the list, there were no folders but I could add a folder and that new folder showed up in Dropbox on other devices (and in the Dropbox app on the iPad)! So there was some connection but not much… This is not an issue I’m experiencing on any of my other Apple devices (Mac or iOS). In talking with Apple support they had me delete the Files app, reboot the iPad, then reinstall “Files.” I did that, but to no effect. They escalated me to a higher level of support but while I was waiting, I also deleted Dropbox and reinstalled it. That solved the problem! So, if you can’t access your Dropbox folders and files in Files or in any of your other iPad apps, just delete and reinstall Dropbox—problem solved (at least for me, this time!)