Applies to: ZWCAD 2015; ZWCAD Classic;ZWCAD 2014; ZWCAD 2017~2019
1) Execute save by manual frequently
Check “Create a backup copy with each save” in Options dialog to generate .bak file when do the save action, the file location is the same with the drawing file.
.Bak file will be created both for manual save or auto save, the manual save will generate the bak file in the same folder of the drawing, while the auto save will generate the bak file in the temp folder since the second time to auto save, because the bak file is to make a backup copy of last auto save result.
2) Make use of “Automatic save”
Automatic save will save the modifications automatically at regular time, which will generate a temporal .zs$ file in the temp folder, you can find the path of temp folder in Options dialog.
3) When crash happens, sometimes, it will pop out a warning information and give a reminder to save or not. If click Yes, ZWCAD would generate a filename_recover.dwg file to save all the modifications before crash. User can recover the drawing from this kind of file to the most extent by Recover function.
Note: for the above 3 ways, the first thing is you need to check both 1) and 2) at any time. After crash, you can find all the 4 files (sometimes less), and then check which one is the latest version, just rename the extension to “DWG” to open. Generally, _recover.dwg>.zs$> .bak(the temp folder).