If you receive error write- protected disk, review the following steps:

Scan USB disk / SD card for viruses.
Avast, obtain a free software like AVG and scan USB drives are the AntiVir software.
Windows 7 - Click here for a free antivirus software for Windows 8.

USB disk / SD card, check over your
Some USB drives, write protection lock is located on the USB stick. Make sure the write protection is unlocked.

write-protected usbk
write-protected SD card drive

USB drive, SD card, check the occupancy rate memory
You can get this error if the USB memory is full.

Check if there are restrictions in the registry
After typing Regedit in the Start, point to Run, press the enter key.
HKEY_LOCAL_MACHINE \ SYSTEM \ CurrentControlSet \ Control \ storagedevicepolicies

Follow the path to the writeprotect feature. Click the right mouse button and select Modify.
Type 0 in the Value section. Exit the registry. You should now be able to write to the USB storage.

Finally, a USB disk / SD card format
You still have the problem persists, back up the information in the USB drive and format the USB drive.

If you want to format a USB drive or USB memory stick to download USB Disk Storage Format Tool, here and try to format the USB Disk Storage Format Tool software.

You can try the second, the HP USB Disk Storage Format tool. You can download the HP USB Disk Storage Format for download here.

The SD memory card if you want to format the SD Formatter 4.0 download You can download the SD card from the SD Formatter 4.0 software.

If the problem still format the USB memory with improved Silicon power formatter program. Silicon power formatter is very successful USB formatting software.

Formatter Silicon Power  Download