USBDLM is a Windows service that gives control over Windows' drive letter assignment for USB drives.
Running as service makes it independent of the logged on user's privileges, so there is no need to give the users the privilege to change drive letters. It automatically solves conflicts between USB drives and network or subst drives of the currently logged on user.
Furthermore you can define new default letters for USB drives and much more.
It works on Windows XP to Windows 11 and Server 2003 to 2025.
What's new in 5.7.6.0
Bugfix: Size of network and subst drives not determined
Bugfix: On high DPI sometimes too small icons in the balloontip
Yes, USB Drive Letter Manager is free to download and use on Windows.
What is the latest version of USB Drive Letter Manager?
The latest version is 5.7.6.0, released on Jan 20, 2025.
Is it safe to download USB Drive Letter Manager?
The download button links to the official installer published on uwe-sieber.de, the same file Windows Package Manager installs. You can verify the downloaded file by comparing its SHA-256 checksum with d78cc0e67c160edd851234143a0530402b2e39a2cf08cc2108ebd5427752f0d7.
Which Windows versions does USB Drive Letter Manager support?
USB Drive Letter Manager runs on Windows and is available for 32-bit (x86), 64-bit (x64) systems.
How do I install USB Drive Letter Manager silently?
Run the offline installer with msiexec /i "usbdlm_x64.msi" /quiet /norestart, or install it with Windows Package Manager: winget install --id=UweSieber.USBDLM -e --silent.
How do I uninstall USB Drive Letter Manager?
Open Settings › Apps › Installed apps, find USB Drive Letter Manager and select Uninstall. From the command line, run winget uninstall --id=UweSieber.USBDLM -e.
Alternatives to USB Drive Letter Manager
Other Disk & Partition programs for Windows from different developers.
smartmontools contains utility programs (smartctl, smartd) to control/monitor storage systems using the Self-Monitoring, Analysis and Reporting Technology System (S.M.A.R.T.) built into most modern AT
