dishuser

home page/settings/more/storage & reset

ok,left arrow and scroll

open the panel on the bottom to make sure it's connected

did you check to see if it's still plugged in?

it frees it up

you have to reset to get server/m3u slots back to normal then set servers up again

have you tried file manager? you select what you want to move and to which device whether it be device to sd/usb or vice versa options are at the bottom of the page