Quote Originally Posted by secondclaw View Post
Yup - I have w580i (a debranded at&t version) and a Sandisk 8gb M2 card - they work perfectly. The card has 1.5gb of free space left though.
Did sony tell you that it only supports 4gb or did you find it on their website?
The SE site (see compatability chart above) only says W580i supports 4GB. Glad to know it supports more though! How is your file access time with the 8GB stick? Is it still pretty quick?