I am importing photos from my memory card into lightroom. Nothing about my process has changed, and I have received errors saying "could not move a file to the requested location" and "files were not imported because they could not be read." I am shooting in raw and am able to upload in Picassa with no issues. Now, this is happening with all of my photos. Why would this be happening? How do I fix it? (I am able to upload and edit the photos in Picassa with no issues)
This is a permissions problem in your operating system.
You need to find the exact folder you are trying to move the photos into during this attempted import, and then change the permissions on that folder so that you have WRITE permission. Since you are getting an error messaged about "could not move", the problem may also be you don't have WRITE permission on the folder where the photos are located prior to import.