“What is this folder and why is it on my PC?”
The DSBRoot folder is a folder for backing up files created by the 'AhnLab Data Safe' program. (Service for this program ended on May 31, 2020.)
The 'AhnLab Data Safe' program saves backup files in this folder. If you turn on this program's real-time backup, it creates 5 backup files per file by default, which may increase the folder capacity.
"I don't want to use this program and I want to delete this folder."
If you do not want to use this program and want to delete this folder, you can delete the backup folder together when uninstalling AhnLab Data Safe from 'Programs and Features' or 'Apps and Features' in Control Panel.
"I failed to select Delete Folder when deleting this program."
Even if you did not delete the folder when uninstalling this program, you can delete this folder like any other folder at any time after uninstalling 'AhnLab Data Safe'.