See here:
"SA">GO LIVE 1005, 4GB, MyDrive Connect NAV3
"SB">GO LIVE 1005, 2GB, MyDrive Connect NAV3 Eol
"SE">GO 1005 / GO 2050, 4GB, MyDrive Connect NAV3
"SF">GO 1005 / GO 2050, 2GB, MyDrive Connect NAV3 Eol
"SI">GO LIVE 1005, 8GB, MyDrive Connect NAV3
"SQ">GO 1005 / GO 2050, 8GB, MyDrive Connect NAV3
"SR">GO 1005 / GO 2050, 4GB + micro-SDHC, MyDrive Connect NAV3
So, check the serial number of your device. If it starts with SB or SF, then it is EOL as the device has only 2 GB. If it starts with any of the other letters, it is fine.