You bought the wrong thing, unfortunately. That's a NAS or Network Attached Storage. Essentially it's a Linux computer (hence the Network part). It has two plays against it - the disk is the wrong format, and the Library should not be on a network location.
iPhoto needs to have the Library sitting on disk formatted Mac OS Extended (Journaled). Users with the Library sitting on disks otherwise formatted regularly report issues including, but not limited to, importing, exporting, saving edits and sharing the photos.
May 15, 2017 Beyond the apps, Seagate's Personal Cloud works with several popular cloud-storage sites, including Google Drive, OneDrive, Dropbox, Box, and Amazon S3. The Seagate Media app gives you access to all the photos, videos, music, and documents stored on your compatible Seagate storage devices. Quickly and easily browse your media library with classic file/folder view, thumbnails or a range of filters. Access your media library stored on a Seagate Wireless device, no Internet needed. Access content stored on your Seagate Personal Cloud. Online shopping from a great selection at Electronics Store. Seagate Webapp. Feb 13, 2017 At home I use the Seagate Media app to access the personal cloud on my TV's through Roku, easy as pie. Now here is the question. As I converted my. I use a Mac and have noticed sometimes access to my seagate storage is cut off and I have to close my finder window to be able to access it again. Don't know if it's common or if I messed up during setup but it is really annoying. The app is also a mess I don't even really use it. Backing up through the cloud.
See this article
for more. Note also the comment:
“Additionally, storing the iPhoto library on a network rather than locally on your computer can also lead to poor performance or data loss.”
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Aug 4, 2015 12:06 PM