Hello, I am by no means (and I mean not even close) an expert. But I installed recalbox to my PC internal HDD by unplugging it from the machine that it will be installed on and using a drive doc attached to my windows PC and then using a free app called Win32DiskImager . I selected the .img file and transferred it to the plugged in hard drive. I then reinserted it into the gaming machine, started the machine and it worked great. I just can't figure out how to put games on the internal hard drive without a network connection.