Premiere Elements 13 on what computer operating system? Have you updated 13 to 13.1 yet using an opened project's Help Menu/Updates?
With regard to this one Chapter and its 4 files (assumed file with both video and audio components)...
1. What happens if you move these files from the external hard drive to the Local Disk C, perhaps, if Windows, My Videos Folder. And, then you import them into the project with the project's Add Media/Files and Folders/?
2. Also of concern....you mention that you recorded these videos with your cell phone. Cell phones are known to record using a variable frame rate. Premiere Elements has problems with file with variable frame rate. The usual remedy is to convert the file with the variable frame rate to one with a constant frame rate. This has been done in the free HandBrake program. Then you import the HandBrake H.264.mp4 with variable frame rate into the Premiere Elements project using the project's Add Media/Files and Folders/
3. What are you recording with your phone - 1080p30 Stereo or 1080p30 5.1 channel or something else? What is your project preset after the videos are on the Timeline? See Edit Menu/Project Settings/General and the readings for Editing Mode, Timebase, Frame Size, Pixel Aspect Ratio (even if the fields look grayed out).
Please consider, and supply details. Then we will put the information together to arrive at a solution. How to details will be supplied as needed.
Thank you for your quick reply!
I will try to understand and find out everything you suggested now. Might take a little while.
I can't believe it worked out! I feel quite silly because I made fun of solutions I googled that suggested to make sure the speakers work. My solution was to save the video on my computer instead of my hard drive. Thanks a lot for your help!
Wonderful news, "....it worked out!" with the consideration for where the file was stored on the computer.
Thanks for the great troubleshooting information supplied and for letting us know the outcome.
Best wishes moving forward with your Premiere Elements projects.