First, 24000 bytes of RAM should be fine, but maybe it's worth checking if there's really nothing else taking up space? Sometimes hidden files can block it. Try clearing the memory or resetting the calculator.

second, your ROM and OS seem okay, but maybe it's worth trying to update Wabbit? Some older versions had bugs with file transfers. A new version might solve the problem.

and one more thing – if you're having trouble with specific programs, try transferring them one by one, not all at once. Sometimes when you transfer too many at once, something can get stuck.

Best regands Christopher 😊