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During the backup, minus 7 GB on the SSD drive

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Hello. During backup, any, folder, file, or disk image, the disk free space is reduced to 7-8 GB. After the copy, the disk space becomes the same. I do daily backups of files and folders from the SSD and 7 GB of the waste of the resource SSD is wasteful, accumulates over the year, up to 3 TB. Why when I make a backup copy of the folder that the drive consumes so much space? Will have to give up your daily backups?
I wrote to the support team, in Russia, the application number 03048030, sent them screenshots and logs of the program, I still didn't answer. What to do?
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Vitaliy, welcome to these User Forums.

From your description of the problem above, this sounds to be an issue caused by Microsoft VSS when snapshots of your data are being created.

I would recommend trying the free Acronis VSS Doctor utility (link in my signature below) to check for any problems with VSS on your computer.  The tool will offer an option to try to resolve any problems that it can deal with.

Next, see KB document 59440: Acronis True Image 2017: 'Snapshot for backup' option overview for how you can change the settings for your backup tasks to not use VSS and check if the behaviour is changed for the free space on your drive.

In reply to by truwrikodrorow…

Hello Steve, thanks for answering and you were right, went to Options -> Advanced -> Performance and selected the NoSnapshot, the problem is gone! Tell me if I will create backups without Snapshot would not have any problems with data recovery?
Thank you very much for the help!

Vitaliy, glad to hear that changing the snapshot option has proved that VSS is giving the problem you were seeing.

I would recommend trying the Acronis snapshot option as an alternative to VSS - this is essentially what was used in older versions of ATIH and will give you a safe alternative to using VSS.

The key benefit of having a snapshot method of backup is that this is created to capture the state of the system, including locked OS programs/files etc so that these are all in a consistent state.  If you opt to not use snapshot at all, then it would be recommended to not use the system during the backup operation (or keep use to a minimum).

There shouldn't be any recovery issues but this really depends on what you are backing up and whether any significant changes had occurred after the data was backed up which might conflict with other data in the backup that is being restored.

Thanks Steve, you helped me a lot and helped me understand the problem. Selected in the settings -> Acronis snapshot, the problem is not observed. I think now everything should be fine.

All the best to you!

Vitaliy, glad that all is looking good for you now, thanks for the feedback.