This is very strange, is this problem persistent with all firmware versions and all makes of cards?
If the process of transferring files is so long, I hope the internal communication of garmin software to the data card is at full speed,
or it will become unuasble at 35KB/s

Anybody getting good performance (file copy speed) on SD cards via USB link to Nuvi 37xx? Or it is blocked to 35KB/s ?