Hi guys!

A few months ago I bought this cheap Sat Nav from ebay (CPU: MTK MST2531 800MHZ [Please Register or Login to download file] ) I've had a few issues with it but initially the seller told me to just delete the maps and reinstall them and this worked but now I got this new "Out of memory" error message and I cannot accept the navigation option. I cannot try to reinstall everything again as the Sat Nav isn't detected on computers anymore (tried it on three different PCs) the USB notification sounds plays but nothing shows on the computers. Anyone has any idea of what I could do about it? (the seller doesn't answer messages anymore.