Not exactly a good idea to broadcast your serial number publicly, though no harm should occur.
Many people have made the card upgrade successfully. If you're having problems:
1) It's recommended to format the NEW card in Windows before copying data over to it from the old card
2) Though really any brand SD card should work, Autel suggests using the generic SanDisk SDHC cards (the blue ones work perfectly) since they're closer in design to what's shipped with the DS708.
-Jeff