Well, I ran the full chkdsk from Command prompt. Among all the info at the end, these figures came up
244 gb total disk space
0 Bad sectors on disk
53 gb in use by system
23 gb available on disk (this figure should be about 80 - 90 gb available!)
61 gb total allocation on disk
6 gb allocated units available on disk
So, I'm no further on to reclaiming my disk space. To summarise Windows says I have used 210 gb total on drive. I reckon it's only 140 gb used.
Somebody posted about reinstalling the driver. I don't have a driver, ony a file called Seagate Launcher which is a Seagate setup file that is on the ext hard drive at the moment. Should I use that??
Or, any other suggestions - this is baffling me. (I defragged again but no difference)
Attached photo shows screenshot of scan using program WinDirStat. Any clues there??
Since posting I used a Drive Wiper to clean the free space on drive but it also only found 23 gb to wipe. I know there's more space on the drive!!!! So far both Windows and two other programs have only recognised 23gb available. So, what next???
Thanks for your input.