Does anyone know if the SFTP Server supports xcrc file hashing?

I am trying to use it in conjunction with Syncback Pro to move files around. However it regularly skips important files due to there only being a few KB difference between the source directory and the destination directory. Syncback has an option to check file hashing to resolve this but says the SFTP server must support XCRC file hashing. As the transfers stop working entirely when this option is selected I assume it doesn't, but want to hear from others. We are currently using a workaround for this issue so I don't really need this resolved. I am just curious at this point.