So, after downloading task manager to see what was happeing memory wise I think I have the problem.... just not a solution. At idle the streak has about 270mb free to play with, when you start transfering files it rapidly drops to 40mb theeeen when you hit about 25 it dissconects. So I transfer files until it cuts out, unplug and start again.
While transfering I leave it well alone, I tried taking off the 3g but it didnt really make a difference. Although a pain I did just transfer 10gb of music in about an hour.
Does someone more techy know how to get around this?