I have trial version of InDesign CS6. I installed it yesterday.
After 8 hours of work it didn't saved, save as, exported me my work.
On the screen appeared window:
Cannot save "Cover_Magazine.indd" under a new name. The file"DBTmp1373-306900835" is damaged (Error code:0)
I didn't put new name just tried to save it. The same happened when I start new project and want to save it.
What can I do to save or export my work
That's generally a fatal error. Are you able to export the file to idml?
As to why it happened, it's hard to say, but this is certainly not normal, and is most likely related to something in your particular system configuration. We would need a lot more information to begin to find the problem, and things are complicated by this being a trial, so you can't just uninstall and try again.
What is the OS? Are you trying to work across a network?