I Restored To The Utilities Partition By Accident

I own a simple 1 TB G - Drive Mobile External

My drive got corrupted somehow, started not showing up properly, tried to run first aid, didn’t work. Retrieved what I could off the drive, and for some reason instead of just reformatting, I restored to the Utilities Partition. And now the drive is only 3.95 GB instead of the 1 TB it was before. Not showing any other partitions. I’ve tried reformatting, but it seems I somehow made my drive a 3.95 GB drive? I’m new to Mac hardware, so any help would be great!