Until today everything worked fine. Today I downloaded new Gateway 3.6.1 and I tried to copy lancher on my SD card. I got error that says This file is large for card and I can't copy it but I have over 2 gb of free space. Then I put my SD card back and tried to boot gateway mode but after Gateway sign screen turns black and I can't enter gateway mode. I backup files from SD card and tried to format SD card with SDFormatter but It says that Memory card is write-protected and please release the write protect switch. I looked on internet how to do that but none of the ways are working. So in short way can't copy files on my SD card, can't boot in gateway, can't format SD cards. Can someone help me what to do? Thanks.