8TB My Book have only 3.5 TB real capacity

WD External and Portable SSD External SSD for Windows
1

Good morning, and thanks for reading
After thinking about it a lot I thought about getting all my files sorted from my PC’s with W10 and W7 respectively and other hard drives, and I bought an external 8TB MyBook disk to unite them , it was enough (I have calculated about 6TB of files). Everything was “fine”, until after a few days of adding data I realized that the numbers did not match. The result is that filling only 2.8 TB or so was missing only 0.7 TB. I was surprised, I checked with other applications to check the files and their sizes and the numbers says the same, the final result was given to me by CHDSK:

3519025152 KB of total disk space.
2274243584 KB in 4107518 files.
362775552 KB in 354248 indexes.
0 KB in bad sectors.
2048 KB in use by the system.
882003968 KB available on disk.

1048576 bytes in each allocation unit.
7630852 total disk allocation units.
861332 allocation units available on disk.

I also tried it with an Ubuntu 17.10, which said me the same numbers, checked the physical state of the disk and it is good but the numbers are wrong: The properties window says it is 8TB disk but that it has only 0.9 free (having used, I repeat, about 2.8 / 2.9 TB)

The hard disk is formatted in a single exFAT partition.

Please,does anyone have any ideas?
Thank you

2

Hi,

If you are using WD Backup, it seems to be that the housekeeping takes up almost as much space as the actual files. This might be due to backing up periodically and keep track of each backup.

For your application you may want to consider using Copy and Paste, which does not provide auto backup but gives you more control. If you are already are using Copy and Paste somethings does seem wrong. But I’m not using it and not that familiar. Of course the file directory will use some space.

Cliff

3

Thanks for your answer…but is the second option. This problem I have is using Copy and Paste :frowning: . I think using WD Backup would be worst. And yes, also I think there is something wrong and I try to know it so I hope to have the possibility to fix it… If not I will try the warranty, but it is not my first intention because aparently nothing is wrong. I have checked the disk with WD Tools and everything seems fine.
Thank you for your attention
nutwision