migrated iPhoto library
seems like I now have 2 photo libraries. A migrated iPhoto library using 195 GB that I can't open and Photos library created Oct 3 2015 using 216 GB ??
Can I delete the "migrated iPhoto library??
You can but it is not a good idea since you might want or need it in the future and it will save very little space since the originals adn previews are shared using Hard links - Photos saves disk space by sharing images with your iPhoto or Aperture libraries - Apple Support
Doing so will not affect Photos but may cause you problems in the future - be sure you have a good archive if you are going to delete it
LN