A1 Mini, Add 1 Print It Removes 1

Memory in printer says 4.1/29.5GH, so why does it remove an old print every time I print a new different print?
It doesn’t remove Bambu installed prints.
When printing a different part/print from Bambu Studio then what’s on the printer, it removes one of the first parts/prints I printed months ago. It will only store 20 parts/prints. Acts like I can only have 20 parts/prints.
Thanks