I don't know how you migrated, but there are other ways besides the zip approach. It's easier to migrate everything, but since you've done part of it, I'll help with the remaining pieces. - locate the sent folder on old PC. if you're not sure how to find that, let me know. The accompanying .msf file is not needed. copy to external media - if not already installed on new PC, install the addon, importexporttools. - create a folder in Local Folders for the desired sent folder. Name it whatever you wish. - highlight the folder, rightclick, select the importexport option to import mbox - locate the sent folder on the external media and click ok.