So I thought i would post in case this helps anyone having trouble getting dashcam set up with a new SD card/ hard drive. I bought this storage solution: https://www.amazon.co.uk/dp/B07855LJ99/ref=pe_3187911_185740111_TE_item Setting up dashcam and sentry mode should have been easy i thought... very clear instructions from this site... How to Setup Tesla DashCam and Sentry Mode - Pure Tesla On windows you need to use a 3rd party app to format a drive this size so I used GUIformat Ridgecrop Consultants Ltd Which seemed to work OK... FAT32 file system confirmed and my TeslaCam folder in place. However.... after multiple attempts repeating the process/ trying quick then slow formats.... the car would never recognise the disk! I don't know why! Anyway... as a last ditch I used another utility to format the disk just in case... and it worked! Download from here: https://www.rmprepusb.com/documents/rmprepusb-beta-versions Set the disk to be non bootable and max partition then press prepare disc. This worked first time and I now have functioning file storage. Great feature!