After upgrade to SSD on laptop, I had extra hard drive that I started to use external (via a USB case). But after a few days of use the problems started with a disk and one day it got a primary partition as RAW file system. Long understood in what the reason - most likely to blame external case, because when chkdisk ran through it, the problem lasted (probably not enough power). Once connected this disk via SATA adapter - chkdisk worked fine (a few hours were fixing something) and now says that everything is in order.
But there is one problem - the disk is visible in Explorer so
not available, even if you start the Explorer with administrator rights. In total commander drive won't open either, but if you run total commander with administrator rights, then the contents of the disk can be seen, everything is read and written.
Question - what could be wrong and how to finally docility drive?