Hi, daffy1234,
Please do this:
Check Disk
WARNING: It is recommended that you backup ALL your files. If CHKDSK finds and repairs a corrupted sector, you may lose your data.
- Click Start, enter cmd.exe in the Search box, right-click on cmd.exe, and then click Run as administrator..
- Type the following command and hit ENTER:
chkdsk /R
- You should see this message:
The type of the file system is NTFS.
Cannot lock current drive.
Chkdsk cannot run because the volume is in use by another
process. Would you like to schedule this volume to be
checked the next time the system restarts? (Y/N)
- Type Y and hit Enter on your keyboard.
- Restart your computer and CHKDSK will run.
Once CHKDSK is compete, we need the log:
- Click Start, enter powershell.exe in the Search box, right-click on powershell.exe, and then click Run as administrator.
- Copy this command:
Get-WinEvent -FilterHashTable @{logname="Application"; id="1001"}| ?{$_.providername –match "wininit"} | fl timecreated, message | out-file $Env:UserProfile\Desktop\CHKDSKResults.txt
- Right-click in Powershell to paste the command.
- You will find CHKDSKResults.txt on your Desktop. Copy/paste that log in your next reply.
Also, will you please run Seagate SeaTools for Windows? Be sure to run the S.M.A.R.T. and Long Generic tests. 
Regards,
bwv848
Edited by bwv848, 28 March 2017 - 08:48 PM.