I've had the same issue some time ago. I'll leave the link to my post with the solution https://forum.xda-developers.com/t/solved-cant-copy-titanium-backup-files-to-pc.4257023/I am not sure if this is the right place to ask, but since I am using dr ketans roms for a long time and never encountered this, I will try. I am trying to do a backup via TitaniumBackup and I simply can't copy the folder with files. Seems permission related, I tried some suggestions like chmod 755 via twrp, but it doesn't do the trick. If I copy something into the folder, I can copy those files out, but the files that are made my TitaniumBackup on the device, I can't. It just says "something went wrong"