The new PE version is the culprit. WinRE, a new option for 7.2, uses the WinPE version on your PC's Recovery partition, which would match whatever version of Windows you're running. The WinPE options in Rescue Media Builder would use whichever version you select. However, even if you selected WinPE 10, Reflect 7.2 uses WinPE 10 1709, whereas Reflect 7.1 used WinPE 10 1607 -- and judging by this thread
, it appears that SMB1 was deprecated starting with WinPE 10 1709. That thread does offer a fix, but it's not ideal for the average user, and it would be a bit tedious to do that every time you needed to update your Rescue Media. Therefore I would suggest investigating the following solutions, in order of preference from ideal to least ideal:
- See if your NAS has a firmware update that allows it to support newer versions of SMB. SMB1 really is very old and insecure at this point, and it's also a lot slower than newer versions. SMB is up to V3.0, fyi, and even SMB 2.0 was introduced over a decade ago now.
- Drop down to WinPE 5. There are relatively few things that WinPE 10 adds over WinPE 5 that are relevant for Rescue Media. The only things that come to mind are support for newer BitLocker encryption schemes and DPI scaling support, the latter ofwhich is very useful if you have a very high resolution display, because without DPI scaling support, text would be microscopic in that situation.
- If you need features in WinPE 10 and your NAS can't be updated, the DISM commands in the thread I linked above should do the trick, although they're not totally comprehensive. Basically, you'd build your Rescue Media first, then use DISM to mount the Boot.wim file inside the Sources folder on the Rescue Media, enter those commands to enable SMB1, then use DISM to unmount the image while committing the changes. I can provide more details about that if needed. But you'll also have to do this every time Reflect updates its own Rescue Media build.