I just ordered a Surface 3, which should be arriving in a few days. My plan is to insert a 128 GB SD Card and have that be the default save location for media, files, etc. I've read a few instructions on how to do so and then I came across this which states it's an easier and "better" method. Was wondering what some of your thoughts are: "I am using a faster method to use the SD card for storing the user personal files (libraries). Open Registry Editor and go to this key: HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindows NTCurrentVersionProfileList Replace the value of entry ProfilesDirectory (%SystemDrive%Users) with D:Users (instead of D: use the drive letter for your SD card). Now create a new user and login to the tablet with the new credentials. The new user profile, including all its libraries will be created under D:Users on the SD card. This method has the advantage it stores on the SD card all the user profile files, including Internet Browser caches, Microsoft profile related files, etc… Make sure you format your SD card as NTFS, so you can store files larger than 4 GB on it."