Supported scenarios and minimum requirements
USMT does not have any explicit or its own CPU, RAM, graphics or HDD requirements. It relies furthermore on the system requirements of the operating system it is executed on. If you do not use hard-link migration or external disk or network path, the hard drives must have sufficient space to contain the migration store, whether compressed or not. Additionally, it will need some temporary space. If unsure, you can estimate the needed space by using scanstate.exe /p.
Note
USMT supports migration to the same OS or a newer OS, but it does not support migration to an older OS. It supports migrating from 32-bit to 32-bit, 32-bit to 64-bit and 64-bit to 64-bit. It does not support migrating from 64-bit to 32-bit. ...
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