When i open my pbix file, power bi return to me an error: FILE DAMAGED OR NOT VALID REPORT FILE How can i fix that?? Thanks
You could try going to this location in power bi options, hope that it may be there if your power bi desktop crashed which could of created the file to go corrupt. if there are any files there try opening them and if the file extension is is not pbix, change it to pbix and try open it.
Are you accessing your pbix files over the network (through a map drive) ?
If you are opening them off the network share then I hope your I.T has enable shadow copy on the volume that the share resides. If you unsure then ask your I.T staff.