Windows file system looks dirty to Ubuntu. This is because Windows uses a hibernation file to save the system state.
You'll need to do this in Windows:
- open the Power control panel
- click on
change what the power buttons do
- click on
change options that are unavailable
- uncheck
fast start
- close the Power control panel
- open an administrative command prompt window
- type
powercfg /h off
(turns off hibernation)
- type
chkdsk /f c:
(change c: to the correct drive letter, if required)
- approve that chkdsk runs at next boot time
- reboot Windows
Now you should be able to boot Ubuntu, and attach the drive successfully.