Huawei C7300 User Manual page 60

After entering the USB mass storage mode, open My Computer on the PC,
open the removable disk that represents the phone, and then access any of
the following folders. Then you can perform Add or Delete operation in
the folder.
music: folder for audio files
pic: folder for pictures
java: folder for the installation files of Java applications
ebook: folder for ebooks
video: folder for video files
others: folder for the files of other types
In USB mass storage mode, you can manage only the files on the
microSD card. To view the information about the files on the
microSD card, you can tap My Files > Memory Card on the
phone.
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