OK, Thank you mlord and Smu. Last night I tried everything I could, but the player would just freeze when trying to ftp anything from it. As I said, it became harder and harder even to just get a directory list. With this solution you suggested I got it to work again. Just to be clearer to those who may need it as well, I just added these two lines at the very beginning of the in the config.ini

[Startup]
ReserveCache=32


Now the ftp seems to be working fine. Hopefully I'll manage to retrieve all the remaining gigs, and upload them, in the new player. I'll let you know!
Thank you.