There has been some confusion lately regarding the BTC firmware update version numbers.
Normally speaking, if you use LiveUpdate (www.drvupdate.com) then you will automatically see which is the latest firmware update version for your drive, but even then some endusers are confused about the version numbers, so please find below the details:
Version number vYYXX (for example, v0657 or v0458)
The first 2 digits (YY) of the firmware version indicate the revision, the last 2 digits (XX) indicate the version number.
So 0657 is the 6th revision of V0057, 0458 is the 4th revision of V0058. So 0458 is newer than 0657 !
BTC Europe Support