The same error occured both when trying to install from an empty samsung ssd, freshly arrived and unpacked from amazon, as well as when i tried to install q4 on the same samsung drive after i had susccessfully installed qubes 3.2 on it (which worked fine).
all the best
kai
I am using this tool http://www.easy2boot.com/
to create my bootable usb, it is very easy to use, you just copy one or more iso image on the usb in the correct directory (e.g. linux or windows) and then run a little windows cmd script and the usb is ready for use. it has an inbuilt automatic menu, where it offers all the isos for bootng at runtime. so easy to create, maintain and to use. and free.
However, if this realy is the case, it explains why I constantly fail to install qubes 4 iso images with it, while all other people, using different tools, aparently do not fail. So may be i need to use rufus or another tool like that..
The funny thing is that it works with Qubes 3.2 installer, but not with Qubes 4.0 installer. So something must have gone worse with Qubes 4 installer, compared to Qubes 3.2 instaler.
All the best
Kai