When Windows detects a drive marked as "Removable" (Removable Media Bit = 1), it applies specific policies:
[Version] Signature="$WINDOWS NT$" Class=DiskDrive ClassGuid=4D36E967-E325-11CE-BFC1-08002BE10318 Provider=%ProviderName% DriverVer=09/04/2012,5.1.2600.0 Cfadisk Inf
Certain database or backup software requires a local fixed disk to function correctly. How to Use Cfadisk.inf (The General Process) When Windows detects a drive marked as "Removable"
[cfadisk_install.HW] AddReg=cfadisk_addreg Cfadisk Inf