Made a Backup with TWRP, but the backup was moved to my computer. Can I still flash?
My experience tells me that for TWRP to detect backup files the latter should be in a directory whose name would be shown as the name of the backup and that directory in turn should be under:

/sdcard/TWRP/BACKUPS/&lt;serial&gt;/  


Here, replace &lt;serial&gt; with the serial number of your device. You can find the serial number of your device using the command:


getprop ro.serialno   # prefix adb shell, as appropriate


E.g. my backup files for the backup named 13-09-2016.Weekly are under:

/sdcard/TWRP/BACKUPS/X1JE45FGI3/13-09-2016.Weekly/