One of the many features that users miss in Windows Phone 7 devices is USB mass storage . The upcoming Windows Phone 8 may add USB mass storage support for simple file management , reports suggest .
Microsoft announced that WP8 will support microSD cards , hence this rumor makes quite sense .
The phone is likely to support USB mass storage by allowing access by mounting the microSD card .
A fully mountable card would mean simple drag and drop file transfer like other Android devices and free from hassles of syncing using Zune .
Source

Microsoft announced that WP8 will support microSD cards , hence this rumor makes quite sense .
The phone is likely to support USB mass storage by allowing access by mounting the microSD card .
A fully mountable card would mean simple drag and drop file transfer like other Android devices and free from hassles of syncing using Zune .
Source