Hi
@Rich964327
I have some bad news for you. Windows Disk Management shows the KOXIA System drive C: has only 933.62-914.77 = 18.85 GB data. This may be the over- provisioning/partitioning data in the SSD. ( The partitions and file system are intact) What that means is you have lost all data.( By contrast the HBCD disk shows 119.48-116.28= 3.2GB which is the actual data in it)
Also a normal system disk C: will have the annotation 'Boot,Pagefile,Crash Dump, Basic Data partition" whereas the KOXIA System Disk C: only says "Basic Data Partition". What that means is the BOOT folder in the system disk is totally lost like all other data. Data in the Active ESP folder also could have been lost. Reason why any boot repair failed.
What I believe is that a catastrophic glitch corrupted all data in the disk. When such a thing happens, the disk controller/firmware will assume that data was intentionally deleted and the ensuing TRIM/Garbage collection operation initiated by the OS will wipe the memory cells clean and keep the disk clean, ready to take any fresh data. Reason why the Crystal Disk info shows 99% health. Yes, the disk is now 100% ready to take in fresh data.
So your only option now is to reinstall Windows. (KOXIA website may have an SSD Utility Management software. Install the appropriate software for your disk and check its health after installing Windows -
SSD Utility Management Software | KIOXIA - Asia Pacific (English))
NOTE for External SSD users::
External SSD users not able to access the SSD should immediately disable TRIM to avoid any chance of data loss. In many cases the users try various things on their own for days to make the disk readable and finally come here for data recovery. By that time TRIM/Garbage collection initiated by the OS would have wiped all data. The sooner TRIM is disabled, better the chances of data recovery
TRIM Commands:
TRIM operation is initiated by Windows OS.
To check whether TRIM is enabled, on an elevated command prompt- (Run as administrator) - enter the following command and press Enter key
fsutil behavior query DisableDeleteNotify
If the output is
DisableDeleteNotify = 1, TRIM is currently disabled on the SSD/s.
If the output is
DisableDeleteNotify = 0, the TRIM is enabled on your SSD/s.
To enable TRIM, on an elevated command prompt enter the following command and press Enter key
fsutil behavior set DisableDeleteNotify 0
To disable TRIM, on an elevated command prompt enter the following command and press Enter key
fsutil behavior set DisableDeleteNotify 1
Remember: If your external SSD becomes inaccessible, immediately disable TRIM and then try data recovery.