The Error fffffffe : Backup Failed error that I see in your backup logs either means that the drive ran out of space on the destination storage device, USB hard drive, at that point in the backup or that the connection was lost to the USB hard drive device. It can also mean that your hard drive that if it is over 2TB in size, which I assume it is since you are backing up 3.1TB in your job, in your case you are getting a failure at 1.8TB in to the 3.1TB of data, is set to MBR partition style and NovaBACKUP only supports GPT (GUID) partition style for hard drives that are 2TB+ in physical size utilized as the destination storage device. We do not support connecting USB hard drives via USB hub so make sure that a USB hub is not in place and re-try the backup.
Read the guide we have on GPT requirement as well as USB sleep settings and not support USB hubs below:
This is NovaStor Technical Support. In reading the description of your issue or by reviewing your log set we have discovered that your destination storage device is a hard drive, most likely a USB external hard drive, which has an un-supported partition style currently set on it which NovaBACKUP does not support. NovaBACKUP has a requirement for destination storage device hard drive(s) to have a particular partition style set on it, that partition style is called GPT (GUID). You either currently have an MBR partition style on that hard drive or by viewing your log set it was undetermined as to if that drive is MBR or GPT (GUIDE). NovaBACKUP's requirement is a hard drive, used as the destination storage device, larger than 2TB require GPT (GUID) partition style, otherwise backups will fail. This is a requirement of the software if the destination storage device hard drive is 2TB or larger in physical size. This requirement typically has a greater effect on Image based backups more than File based backups, which means that your non-Image based backups may have been working fine without the GPT setting in place on the destination storage device.
Does NovaBACKUP software work with hard drives that are 2TB or larger in size?
Yes. NovaBACKUP supports drives that are 2TB or larger in size, but those drives must be converted to GPT (GUID partition table) partitions as Windows has a limit of 2TB partition using MBR (Master Boot Record).
NOTE: Image Backup requires GPT (GUID) partition style to work effectively if utilizing a 2TB or larger hard drive as the destination storage device for your images.
Here is the link to the Knowledge Base article to check and set your hard drive to GPT instead of MBR: GPT Requirement Guide.
This is NovaStor Technical Support. We believe that you would benefit from reading this Knowledge Base article titled "Disable USB sleep settings (to correct backup device issues)" after reading the description of your ticket / question or by reviewing your log set. Here is that article text:
WARNING: DO NOT CONNECT YOUR USB HARD DRIVE TO A USB HUB, DIRECTLY CONNECT THE USB DRIVE DIRECTLY TO A USB PORT ON THE PC. NovaBACKUP does not support connecting a USB hard drive through a USB hub. This will cause backup errors to occur and most likely will cause the backup job to stop mid-way through.
If you seem to have trouble with USB external hard drive disconnecting or going to sleep prior to, during or after a backup follow this guide to disable various Windows sleep settings that might be enabled and causing interruption:
It may be that your USB destination storage device is going to sleep at some point either during the backup job or after. Make sure that Sleep mode is turned off for the USB port devices in "Control Panel -> Device Manager -> Universal Serial Bus controllers" area. Click on each device under that section and check if there is a Power Management tab that exists in each device and if it does, then in each case, un-check the "Allow the computer to turn off this device.." property in each case and click OK to save that change.
Next in the Windows Power Options (Power Management) area, "Control Panel -> Power Options" click on Advanced to go to the Advanced Power Management options, you may have to click on "Change plan settings" on the plan that you are using and then after that click "Change advanced power settings". Locate the "USB settings" section and then expand that section. Disable the "USB selective suspend setting" to set it to "Disabled" instead of the default which is "Enabled". Now locate the "Hard disk" section and disable the "Turn off hard disk after" setting so that it is set to "0" which is disabled. Now locate the "Sleep" section and disable all of the Sleep settings here to set them all to disabled for testing purposes.