I've never experienced anything like this and am sorry to hear of your difficulties. I've lost all my data twice but that was due to me being silly and not keeping back up copies. Both were due to HDD hardware failures. I now have everything stored on folders on two separate HDD drives. The only advice I would give is try and reinstall those bluetooth drivers. Perhaps search on google or contact who you bought the hardware from and see if they have any ideas to get it back with the correct drivers. I'd never use 'My Documents' or the Macintosh equivalent whatever that is these days, to store anything. I'd advise organizing your own folders on separate hard drives from the system disk and keeping a copy also on a separate hard drive.
Thanks for your suggestions Michael. I regularly backup my disks, so thank God no data lost. I always keep a high quality SD card in the embedded reader and backup my work several times during the day. In addition, I backup to a thumb drive each night. Finally, I do system backups on 3 separate hard drives every month (today I decided to do this every week). After restoring the system my tablet seems to works fine now, but we will see.
What I am stunned with is the fact that more than 3/4th of my SSD contents were erased (and only about half recoverable). And that happened while Windows 7 was functional, I mean, try formatting your main drive when you are running an OS, isn't it odd?
The problem is it's not always clear who is responsible for such a data loss due to the owners of the operating system being involved and also the fact hardware manufacturers tell you to make back ups in case installing a driver or update goes pear shaped.