HiI have a problem with Windows 7 RTM and copying to a USB device. All devices are correctly detected by Windows 7. When I start a copy of some small files, normally this works. However, when I want to copy some large files (500 MB - 2 GB), Explorer will "freeze" and after a while Windows becomes unresponsive, I can only do a reset of my machine. THis happsn both on usb sticks or usb harddisks. On Vista, these devices work perfectly. The other way works, so when I want to copysomething from an USB device to my pc it works. Also copying between internal harddrives does'nt give an issue.What can be the cause? I tried removing the usb host / hub devices from Windows, so that these would be renstalled. I also removed Antivirus software. Further more, I reformated the usb sticks and hard drives without luck.

How are the USB drives formatted? I have a 16GB USB stick and a Western Digital Passport USB hard drive. Both are formatted NTFS. I had no difficulty copying a 7.5GB vhd file to the stick from a Windows 7 RTM laptop, nor did I have any trouble copying a 16GB True Image backup file from the laptop to the WD drive. If the USB drives you are using are not formatted NTFS, it might be worth giving that a try.

You would only get issues copying files >4GB SINGLE file wit FAT32 file system, with the error being "Disk Full". Are the chipset drivers for your motherboard installed?