I use 4 GB cards primarily for backups. I've never had a problem, unlike with DVDs. I already had two non-SDHC 4 GB cards and wanted another. However, non-HC cards are becoming increasingly hard to find at a good price. So I decided to give this card+reader a try since it was so affordable. It works very well, with a read/write speed of about 4 MBytes/Sec on my Dell XPS computer. That's not as good as the 7.5 MB speed I get with the 13-in-1 media card reader on the computer, but that reader does not support SDHC cards. So, although the speed is less with this reader, I should now be able to use 8 GB or even 16 GB HC cards. I may even start using it as a media drive in addition to backups.BTW, this reader is very easy to use. Just plug it into any available USB port and wait for Windows to initialize it. It is drive I:\ on my computer, but I'm sure that varies by computer and OS.