DAC: unsupported USB drives ?

Sorry for re-opening this (long ago) long discussed issue but I have upgraded the firmware of a s/h Naim DAC from 3.9.6 to 4.10.6 and realized that the very same USB drive used to carry out the upgrade (which went through flawlessly) is not detected under 4.10.6.

In fact, of the three USB drives which used to work under 3.9.6 -- a 8 GB Toshiba, a 4 GB Cruzer and a 64 GB Toshiba -- only the Cruzer is recognized under 4.10.6.

Thus, the question is: which current USB drives are known *not* to work under 4.10.6 ? I am particulary interested in 32, 64 and 128 GB USB drives that do not work since these are still relatively expensive compared to low capacity drives.