I want to create a portable device similar in design as a 2ds/3ds,but as a mini duel screen laptop/computer and was looking for some ideas on how to go about doing this. Preferable as affordably as possible i don't have a 3d printer and i want to use as little plastic parts as possible so I'm going ...

Your SD card has failed. One of the failure modes is that it permanently goes read only in an attempt to preserve your data. What you're seeing is the result of the OS caching changes in memory. When you reboot, you lose the contents of the cache so you're seeing the unaltered card contents again. ...

I created a folder and several text documents and when i shut it down then went back on they were done i tryed a few times and everything time they are gone it also seems to undo things iv sent to the trash

What OS do you use? If it's Raspbian (not using NOOBS): Stick the SD card in another computer (if it's Windows it may tell you the card needs formatting. Ignore that) Then find and edit confg.txt. Change 'gpu_mem' to a normal value (64 or 128 should be OK) It is Raspbian but it is NOOBS or atleast ...

I was having trouble with a graphics program so i experimented with turning up the GPU memory. I then put it too high and everything completely froze when it rebooted and now it's completely stuck i can't shut it down properly and unblugging a debugging just boots it back to being frozen without any...