anyone could reccomend me the fastest way to transfer files from seedbox to comp?

anyway my home broadband supportss up to 1,5mB/s download
tried :
winscp (only 200kB/s)

smartftp(only 400kB/s)

last thing i use is CuteFTP which give me about 2mbps equalled to about 300kB/s

anyone found the fastest way which you could reccomend please post here

thanks!