I'm not too experienced with code including external memory, but i believe there was an error with the code mixing that either mixed lines of code up or got rid of code to save files onto your device. Try looking up code for the device, see if that helps at all.
1 or 2 ways I can try to figure out and see what is causing your computer to do this. 1 when was the last time you shut off OR was doing on the computer? If your problem gets fixed make sure you close all running apps so the apps don't update while your computer is shutdown. 2 did you or something unplug the cables? Or maybe a virus caused something. Try to unplug every cable and wait about 5-10 minutes and if your computer is still not working, I would advise contacting an administrator.
Hope this helped.
Answer:
NOPE
Explanation:
sometimes presentations can be for one person only. For instance if you work in a company sometimes you present for your boss only etc.
Hope this helped :)
Answer:
chaos among people who worked in the company.