After trying many versions with XAR in the filename (for US cellphones) which didn't work, I found a combination folder at Samsung SM-P600 Combination File ROM (Flash File) (), and extracted the tar.md5 file, which I put into the AP block of Odin. Samsung sells so many products (cellphones and tablets) internationally (with different country codes) that quickly become older (so software becomes outdated), so it is difficult to find the right firmware (lack of good support).

Then Odin recognized the tablet, but I faced a third problem: The solution was to restart the tablet by pressing On and the Volume Down buttons simultaneously, which took me to the tablet's Downloader selection. However, I faced another problem when the Samsung Odin installer would not 'add' the tablet. With TWRP, I mounted the tablet drive and other selections, and it was recognized. After much tinkering, I found out why my PC did not see the Galaxy.