.!QB file format is associated with qBittorrent software application. It is cross platform bitTorrent client which is based on libtorrent-rasterbar.
This application is used to share files of large volume. The information and metadata of the file to download is stored in separate file. The qBittorrent application uses that file to download file. The file is divided into a number of parts and when downloading the downloaded parts are stored in one single file with !QB file format. Unless the file is completely downloaded, its extension is not changed from !QB. This file contains downloaded parts of the complete file which is being downloaded.
In addition to the problem described above, i.e. the lack of the appropriate application to support the .!QB file, there may be several reasons that cause problems with opening and operation of the data format:
A quite common problem is the lack of application in the appropriate version. Even if you have an application, with the help of which you should open the .!QB file, you may have a problem with it because of its version. Perhaps in previous versions the application has not yet supported the .!QB file, so download the update and check again.
If you have already installed the appropriate application, and it is the correct version, the file may not open correctly, because the operating system does not have information that this program supports the file. So you need to "show" which program the computer should use. To do this:
It also happens that the file you want to open is corrupt and therefore there is no such possibility. In this situation, you should find its different version, or ask a person from whom you got, to send it again.
There may be several reasons why you cannot open the file with .!QB extension. Directly on this website you can find a solution of the most common problem with the .!QB file – that you do not have on your computer the appropriate program to open the file.