Some flash media can be act out when copying large amounts of data at once. When copying to my eee pc's SSD, it takes ma about 25 minutes, but when i did the same command to my sdhc card, it took nearly 2 hours. 2 suggestions to try would to be:
wait it out
copy in small portions
Also, there are options in the Konsole to monitor for activity and silence. If you enable these, and have them emit a sound, you can essentially start the copy, turn your volume up, and walk away, do whatever, and it will call you back when it's ready



