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Usually this is possible either directly through the file explorer or through the backup software that used to create the backup.
All types of data can be backed up, in most cases even the whole operating system including the software that was previously installed.
Usually, the amount of data that can be backed up is limited by the storage of the backup solution. If you for instance want the backup all of the data of your main drive on your computer, the place where you want to store your data has to be as big or bigger in terms of storage size to accommodate this data.