error cloning windows 10 pro into external ssd scandisk

[admin]

Please send us the user.log file located in the bin folder under the installation directory of WinToUSB (via e-mail at: [email protected]), and we will resolve it as soon as possible.

It seems that there has file system error on the Windows partition (Usually C, so please run chkdsk to scan the  Windows partition and see if it have file system errors. If Yes, run the command 'chkdsk C: /F /X' fix it and try again.
For more infomation about chkdsk,  please visit: 
https://docs.microsoft.com/en-us/windows...nds/chkdsk