I pay a heavy price in WinToGo

I was trying to get WinToGo to install on iOmega USB hdd

I create a 64Gb partition in front of HDD (too bad it turn out be extFAT)
the other partition contain all the previous of fujitsu HDD and SharePoint objects

I was too happy to get a refressh Win image .wim file

Windows To Go process pass
only i have to pinpoint to rest directory of wim files as the search is too slow

After that i reboot
BIOS can not see the USB HDD
but i persist on after nothing happen

then i remove internal HDD
still something wrong

put back internal HDD
and realized WinToGo overwrite the other 430Gb partition instead

but still the partiton is not active and no drive no to it

so in the process i lose fujitsu C: drive and sharepoint objects etc