Open PLI wont make backup

i'm using latest Open pli 7.1 from this forum and it's working flawlessly but the problem is
i Can't make backup, I plugged my usb and using plugin backup i created a backup and it's just 2.5MB NFI file
Then i tried to restore this on an another DM800 box that running the same Openpli 7.1 But it shows there is no nfi file found to flash
but i can see the files from the Pc what could be the Problem,
Any help would be appreciate

Quote from zilizila

Use the fullbackup plugin.

Thanks... i will try :)

Tried version 6.6 and 6.8 and also backup suite plugin Every plugin makes file about 2.4MB NFI and i also can't restore it, because it not showing in restore menu
still same issue
I need a full backup to restore to an another dm800 or same one, is there any other tool that i can do this

Thanks i will try