[CCleaner & ceramic hard drives]

One would need to research the density and durability of the nand cache. This may be entirely different than what is used in the cheap consumer grade SSDs. This may be large geometry and SLC, thus it would have billions of write cycles. It has to!

[why do I only see thhumbnails after recovering my usb hard drive]

Each .jpg has a small tiny .jpg within itself. This is the preview information. Sounds like rest of the file has not been correctly recovered due to a multitude of reasons.

[lost bookmarks, emails, passwords help]

Regardless of how "safe" ccleaner is purported to be, it's best to have some kind of fallback position when running it for the first time. Happy to see you got out of the mess unscathed.

[Driver Software Trick]

Disk imaging is a good thing. Install folders are good things.

[Some issues with Recuva- MFT entries and Hangs]

Curious. Since there is no safe NTFS facility to do it, but ccleaner does it while working in/under NTFS; one can conclude that CCleaner is unsafe.

[Driver Software Trick]

Bad advice. I could never advocate getting rid of system discs in any situation. If they bother you, put them aside in the closet.