I set memory for GPU (max). Rebooted rpi but it not working properly

[Skilowi]

I set memory for GPU (max). Rebooted rpi but it not working properly. It don't see Mouse and Keyboard, and external disc. How to repair it?

[jamesh]

Set it back to wehatever it was before. You will never need to set it to more than 512, and even 256 would be a lot.

You will need to do that by editing the config.txt by inserted the SD card in another device