1. Get into the Personal Folder subfolder which you would like to convert into a text document.

2. Select all the e-mail. You can go to Edit --> Select All or use the keyboard and press Ctrl+A.

3. Go to File --> Save As --> Give the document a descriptive name --> Choose the location where you would like to save the document --> Save.

That's all there is to it. You can open the document using Word or Notepad and do a Search or Find to locate specific messages. Now you can delete the subfolder and save yourself some space on your hard drive.