When I save the shapefiles and the project the shapefiles do not save so I loose a lot of work every day. The problem starts when qgis starts to delay the save of the layers after long time in edit mode, so at the end of the day I save the project and the layers and the next day I don't have the last information in the layers that I saved. I have also set up the auto save for the 30 minutes but still doesn't save. What is the problem? I think it is the cache information. I am using qgis is 2.18.18.