If you are the owner of a smartphone cu Windows Phone 7 (HTC , LG, Ect ..) and storage space on the device has become a problem, then it is best to quit media files (photos, video, music) stored on memory deviceacquis.
Remove Media Files from Windows Phone 7 Device (Internal Storage)
1. Con device to your computer Windows Phone Connector 7 and click the button Device Options.
2. In the panel that opens, click on Delete All Content and click Delete Content to confirm.
After making confirmation removalAll media files on the device's internal memory will be deleted and the free space will increase.