Here are some ways to format pen drive which is write protected :
Step 1. Connect your USB flash drive or pen drive to PC, launch EaseUS partition tool. Select and right-click the device you want to format and choose "Format partition" by right clicking the mouse.
Step 2. Configurate the label you want in the Partition Label box.
Step 3. Select the file system type to be created from the "File System" drop-down list. (FAT/FAT32, NTFS, EXT2/EXT3). If the USB drive is larger than 4GB, you can only choose FAT32, NTFS or EXT2/EXT3; and if the partition is smaller than 4GB, you can choose FAT, FAT32, NTFS or EXT2/EXT3.
Step 4. Choose the Cluster Size (512 bytes, 1, 2, 4...64KB) from drop-down list and click "OK" to apply the format operation.
Step 5. Click "Apply" to confirm to format the write-protected USB flash drive or pen drive.