AutoSave and backup
Every new GCADPlus drawing has the extension .lcd (lcd is the gCADPlus native file format).
When gCADPlus saves and closes a drawing in lcd format, a backup copy of the file is saved with the extension .bak. As an additional safeguard, every 10 minutes, or at a time you have set while you are drafting, gCADPlus saves a further copy of the drawing with the extension .lc$ and asks if you want to backup the current drawing. These automatic backup files are normally stored in the same folder as the original file. For example, User>My Documents>gCADPlus>Drawings folder as drawingname.lc$.
If for some reason you need to access backup files, both the backup (.bak) and AutoSave files (.lc$) files need to be renamed from noname.lc$ perhaps to a name such as Recovered.lcd in order for the backup copy to be worked on.
Good working practice
Your CAD drawings are a valuable store of information and need to be protected. Use the increment and backup tool (the green plus sign on the standard toolbar).
We like to create a folder called Jobs in the My Documents folder and then sub folders for each calendar year and then each job is filed in a folder named after the street address. For example, a job carried out in 2013 at an address 75 James Street, in a suburb called Paradise would be filed in Jobs>2013>75JamesParadise.
Any new symbols and blocks created that are not part of gCADPlus are stored in a Blocks folder at the top level of the Jobs folder
Backing up data is then quite straightforward - the Jobs folder is copied to a backup device. We suggest that you use a cloud storage system and put a copy there as a further precaution. Microsoft, DropBox and Google + have an excellent free systems.