How to recover data from inaccessible USB flash drive?

I have a 16GB transcend external USB flash drive (Storejet 25M2) which I cannot access it. The problem is I cannot see it in My computer but is visible in device manager. When I plugged in it asks me to format the drive, a message like this, "The disk in drive is not formatted. Do you want to format it now?". Please help me.

Have you ever encountered with similar problem? When you try to access your important data from your externaldrive, but you receive a message from OS like these:

1. The disk in drive is not formatted. Do you want to format it now?

2. Invalid media type reading drive. Abort, Retry, Fail?

3. Sector not found.

4. The type of the file system is RAW. CHKDSK is not available for RAW drive

In such situations, your external USB drive always shown as RAW drive. The properties of the drive often show 0 bytes. But there actually were some important data for you such as photos, music, videos, documents, and so on. You can get data back from an inaccessiable USB flash drive with M3 Data Recovery, please downoad it.?

Recover data from RAW USB flash drive, inaccessible USB flash drive, formatted USB flash drive in Windows 8, Windows 7, XP, or Vista


1. Please keep in mind, do not format the inaccessiable drive when you see the warning message from OS.

2. Please do not use the inaccesiable USB drive before you get lost data back.

Then follow the step-by-step tutorial to recover data from inaccessiable, RAW or formatted USB flash drive.

Step 1: Install, launch M3 Data Recovery and choose "Format Recovery" module.

Choose Format Recovery module

Step 2: Choose a partition that you can't access and click "Next>" button.

Scan the inaccessible drive to find the lost files

Step 3: You'll see all of you files on the inaccessiable drive will be listed as a file list. Select the files you want to recover to save them.

Recover data from formatted drive

Besides recovering data from RAW, inaccessible or formatted drive, M3 Data Recovery Free can also recover data lost due to partition loss, deletion, virus infection, software crash, unexpected computer shutdown and other unknown reasons.