Help Galaxy tab 10.1 will not update OTA or through Kies


Android Question

okay, so I found my old galaxy tab 10.1 from 5 years ago. It was in the bottom of the closet in my old room. It still works, keeps a charge, but I can't do anything on it because the OS is so old. It's still on honeycomb 3.1

It won't let me update the system OTA, and it won't let me update through Kies because it won't even recognize the device. What can I do? I've already done a hard reset, wiped everything, and now I just want to update it so I can download my old apps and start using it again but I'm stuck. I've googled for hours to no avail. Please help