Photos app not fully syncing
I have, as so many, installed the new Photo's app which replaces iPhoto. I have also purchased a 500GB cloud package so I can sync my entire photo library across all my devices. However, the sync is not working properly. After a couple of days of uploading my entire photo library to the cloud, the process stopped. Now I am left with a main library on my iMac with 45.400 photos, while on my other devices only 37.100 photos have synced.
I am terrified that this could result in losing many of my photos but also very disappointed as some of my albums on my devices only contain half or less of the pictures originally in them. Please help me to make iCloud properly sync my Photo's library.
I don't know what to do.Thank you very much in advance for any help.
iMac, OS X Yosemite (10.10.3), iPhoto transition to Photo's app