I presume though, that this limit is the limit of characters stored, not the size of the memory. If you compress, of course you can store the same characters in

I presume though, that this limit is the limit of characters stored, not the size of the memory. If you compress, of course you can store the same characters in a smaller amount of memory but that is not going to help the prisoner because the prison won't approve a larger number of characters stored. It likely doesn't help the manufacturers any either, since memory is cheap now. Its going to be arbitrary, but I understand prison rules often are.