Backup Files
A backup drawing is a copy of a drawing that gets created after the drawing is saved. Backup drawings are saved in the folder where the original drawing is saved.
If the option to create two versions of a backup is ticked under
Settings > System Settings, two versions of the backup will be saved in the same folder where the drawing is saved.
The versions of the backups will be over-written as newer versions of the backup are created.

Backup files will get updated every time you save the drawing.
NB: YOU MUST SAVE THE DRAWING IN ORDER TO UPDATE THE DRAWING
To recover backup files, go to the folder where the files are saved, and rename a file that has file extension
.bak.
Recovery Files
Crash recovery recovers the files which were not saved but remain within a period of time specified under the crash recovery settings (for example 5 minutes).

Crash recovery files are Templar files that are stored under:
C:\Users\\AppData\Local\Temp\Knowledge Base Software (Windows8)
The user also has the option to specify the path of a folder where autoSAVE can read crashed files.
AllyCAD automatically updates these files according to the time specified on the crash recovery settings.
NOTE: it is not advisable to recover crashed files by copying and pasting elsewhere and renaming the file extension.