@weirdani
Sure they don't delete, but they overwrite. Getting the older and 1.3-compatible version of xyz may proove difficult.
On the topic:
Get a null-modem cable, and send the files from the PC.
On the miggy side :
Well thats a bit complicated assuming you don't have a terminal-program ready (which I would advise as 1st download).
You may try something like:
type ser: >filename (AmigaDOS-gurus might know better).