Phone connected as USB storage but PC can't connect to SD card I have a Huawei Prism II, and my laptop is running Win7.  When I connect it to my laptop's USB port, I get a notification that says "Connected as USB storage," but when I go to My Computer, the phone is showing as:

CD Drive (E:) Mobile Partner
0 bytes free of 7.75 MB
CDFS


So the SD card's memory isn't available to transfer files.  When I go to the Notifications screen and tap "Connected as USB storage", the radio button for "USB storage device" is already selected.  I can select the "Media device (MTP)" option and successfully perform file transfer to/from my SD card this way, but I'm wondering why the "USB storage device" option doesn't make the SD card available.
It looks to me you need the USB driver on your pc. Search Huawei site for "USB driver". Also set "USB Debug" on (on your phone, that is. I don't know if this alone would solve your problem, though).