Local copy could not be renamed try a different name

Android
2

Which server version are you using?

Version 2.9 of Android app only supports server version 9.x and newer. I encourage you to upgrade your server version, and any question or problem about it, check it here: https://central.owncloud.org/

If you don’t have the choice to upgrade your server, you can get the 2.8.0 version (the latest Android version that supports old server versions) from F-Droid. To get it, follow these steps:

  1. Install F-droid app from http://f-droid.org
  2. In F-droid app, tap on “Settings”, placed in the bottom bar.
  3. Tap on “Repositories”
  4. Enable the option “F-Droid Archive”
  5. Go back to the F-Droid main screen, and search for ownCloud by using the lens icon on the floating button
  6. Scroll down, and in “versions”, get the 2.8.0 version

Let us know any problem or suggestion you have.