Unable to save any characters

Me and my friend keep playing online but every single time we do it his character doesn’t save for some reason. We will go to play the next day and his character wont be there. Anyone know how to fix this?

Make sure that your save file is not set to ‘read only’. For some reason this can get changed, happened to me recently.

I tried that but it keeps changing it back to read only even though I change it as an administrator