Ahead of Google's Android event on the 29th we're getting more confirmation of a storage upgrade for the Nexus 7 as 32GB units have been spotted on shelves at US retailers. Seemingly dead-set on matching the LG E960 "Mako" Nexus G for the title of worst-kept secret, we've received this photo of a tag for the new unit at a Sam's Club (with a placeholder price), while reports on Android Central and The Verge mention hardware spotted at Staples location
