Backed up my emails/calendar the other day…first I selected the File > Archive option but cancelled the process after a few seconds as I realised it my emails were dissapearing as they were archived. (yep I chose the wrong option) So I used File > Export instead as normal, which was successful and I now have a back up on my portable hard drive. I deleted the archive file which Outlook created on the first attempt, but now each time I start Outlook it asks for that file. If I click cancel I can go to my emails as normal. Anyone know how to stop Outlook asking for the file?

Try setting it up so that Outlook can access the file successfully. Then right click on that archive and click "close this folder"

Could also try going to the down arrow at the top of the mail folders list on the left and deselecting that archive

Edit – Better way to archive is to set up auto archive (right click > properties > autoarchive) and select or create the file you want

Thanks will try that