How to clear the SD/USB media partition before reflashing

How to clear the SD/USB media partition before reflashing

How to clear the previously flashed ENS image from an SD card or a USB stick so that Windows can see the card, and write a new image to the device. 

***CAUTION*** This is a potentially dangerous procedure that if done hastily and without double-checking, could result in wiping your computer's HDD. **DO NOT ATTEMPT THIS IF YOU ARE NOT COMFORTABLE IN THE WINDOWS COMMAND PROMPT. BE CAREFUL!!!**

All commands are without quotes unless otherwise specified

  1. Open a command prompt window. Again, if you dont know how to do this, stop here and find someone familiar with working on the command line.
  2. Type "diskpart" and press Enter. Approve the User Account Control prompt (Say Yes)
  3. Type "list disk" and press Enter. This will show a list of disks on your computer. 
  4. Match the size of the SD/USB media to the listed disks. If you have an 2GB card, you're looking for roughly "2000 MB". Note the MB, NOT GB. 2000MB == 2GB. A 4GB card will show as < 4000 MB. It will RARELY be disk 0. 
    It is crucially important that you select the CORRECT disk at this stage
  5. Type "select disk #" where # is the number of the usb/sd disk 
    **CAUTION If you accidentally selected your system drive and perform the next step, your COMPUTER WILL NO LONGER BOOT!!! BE CERTAIN YOU'VE SELECTED THE CORRECT DISK**
  6. If you're sure you selected the correct drive, type "clean" and press Enter. This will wipe the disk's partition information.




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