Recovering lost files

[amon178]

So I was working on this project of mine for the last week or so, a really large image with various small details, when suddenly my pc crashed and i hadn't saved the file. how can i get it back? someone please help me!

[John Waller]

Which operating system?

Which version of Photoshop? Are background save and auto-recover enabled in Photoshop?

Background save and autorecover

Do you have any backup strategies in place on your PC?

e.g. AJC Active Backup automatically backs everything up to the last keystroke

AJC Active Backup, instantly backup files and keep multiple versions to undo

[JJMack]

If you never saved it. Your document was never a file so there is no file you can get back.  If you have CS6 or newer you should set your Photoshop preferences to autosave recovery files.  If there is a crash when you start Photoshop the next time  Photoshop will open any PSB it finds in your user id AutoRecover folder to help you recover your unsaved work.