Scenario: You are trying to migrate OS to SSD of smaller capacity than the source drive, but with enough space to allocate the files from the source drive. You get “No free space” error (0x10003).
Laptop users with additional OEM partitions on the drive often report this error.
Solution: Please use Windows Disk Management console (Start – Run… diskmgmt.msc) to Shrink C: volume to size lesser than SSD capacity.
Perform migration again, then Expand C: volume back.