This article describes how to remove unused drivers that are not shown in Device Manager

Lists all PCI devices

Detailed description of how Acronis True Image Echo works with tape autoloaders and separate tape drives

The Acronis True Image line products support almost any of the most popular storage devices

Try disabling write caching for the USB drive to solve the issue

Delete snapman and snapman380 registry values and update Acronis drivers

Peculiarities and limitations of using Acronis True Image corporate products with tape drives

Acronis Backup & Recovery 10 supports most of the popular storage media and devices

Plug in the external device that has the backup or remove the backup from the list. Or change the drive letter of external disk back to the original one

Make sure the external device (e.g. USB disk) is plugged in and working

Why saving an image to a mapped drive may sometimes fail

Acronis True Image does not recognize tape drives when ARCserve is enabled

Getting started on using tape device

Acronis Backup & Recovery 11 supports USB tape drives in Build 17437

Windows System Information file lets an Acronis Support Representative have a better insight into situation

Acronis Backup & Recovery 11 supports most of the popular storage media and devices

If for some reason you do not know the name of the agent who performed the operation, you can always check it in the Activities tab. To do this, click on the activity and the agent's name will be displayed in the activity details.

All the current versions of Acronis products support USB 3.0.

USB 3.0 support has been implemented in the following products:


  1. "Clone Disk" feature of Acronis True Image 2019 is used.
  2. Before the cloning starts, source and destination disks are connected using different interfaces, for example, the source is an internal SATA disk and the destination is an external USB disk.
  3. The operating system is Windows XP, 7 or 8.
  4. You boot the clone system after the disk cloning finishes.
  5. There is no sound and/or USB devices do not work.


Known issue with the disk cloning tool in Acronis True Image, occurring sporadically. 


You are using Agent for VMware or Agent for Hyper-V or Agent for Scale Computing HC3 (in Acronis Cyber Protect 15) to protect virtual machines in agentless mode.

In addition to agentless backup, you installed one or several of the following Agents inside a VM:

  • Agent for Windows
  • Agent for Linux
  • Agent for SQL 
  • Agent for Exchange

Machine with Agent appears twice in the list of All devices: once as a virtual machine, once as a virtual machine with an agent inside.


In the Management Portal, you check the Overview > Usage tab:

You see additional workload quota usage (i.e. Workstations/ Servers/ VMs).

The usage in the Management Portal does not match the actual amount of devices registered in this tenant. Some extra seats are occupied.


After a device has been removed from the Protection Console, its quota usage is not released and the seat remains occupied.