I've been coding on the school TI 84+ recently and I don't have a cord to back it up. I'm not the only one who uses the TI, so I'm afraid that someone will clear the memory accidentally. What can I do to make my programs "wipe-proof"?
You can create a Group, which basically captures things in RAM so you can restore them later. You can get to the group menu by pressing [2ND][+][^][ENTER]. After the ram is cleared, simply ungroup the group to restore the items you previously grouped. This will only protect against RAM clears, there is no way to protect against a complete memory clear besides backing up the calculator to a computer or another calculator though.
My personal method would be storing the programs in groups, which can be found in memory. They take up archive space, so Clear RAM won't delete it.
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You can also archive them by pressing [2ND] [PLUS(MEM)] [2(Mem Mgmt/Deletion)] [1(all)] and then scroll to the program, string, pic, etc that you wish to protect, then press enter to archive it. You must use the same process to unarchive and run it though.
There is no way to save something on-calc that will survive a full memory (RAM and Archive) clear. However, you can use a computer-to-calc link and a linking program such as TI-Connect or TiLP to back programs up on your computer to then be re-installed later.