There are two way's to make a backup. (Maybe more)
1 create an autobackup which is nothing more then a backup of your settings (Channel list) including the settings of your installed plugins.
And if you enabled it "create autoinstall on yes" ,a list of installed plugins.
When you flash a new image the installed plugins of the previous image will be downloaded and installed automatic if the plugins came from the feed of Openpli.
You can use self downloaded plugins from the net in the autoinstall file but use the search on this forum for that.
2 Use the dflash plugin to create a full backup.
I prefer option 1
ET10000+ Openpli 6.1,1m schotel 4x duo-lnb op vaste opstelling.
Momolights teensy 2.0 met 50 leds op een string ,150 channels
DM8000 Openpli 6.1 Release