Library is now about 7-8 for your replies. I want faster performance, dependable HDs/ reliable backups, easy access to all my photos. I want to be able to access my old images for processing.
Though I formatted it for use with Mac it has not been working optimally - the 'on' light never comes on, unless I dismount it immediately after completing download (using it as backup) it won't dismount, and it occassionally makes noises that WDs website says indicate inadequate power (has its own plug in the wall power cord.) This year I've been using a 2TB Sandisk SSD drive as my working drive for current photos.
Lastyear I bought a 10 TB WD My Book with the plan of copying all the old images to it. For years I have used 2 external hard drives for my library - one as my 'primary' working drive and the other as backup. Also that computer won't accommodate some of the newer processing software and my internal hard drive is filling up. I use Lightroom Classic and Photoshop and the performance on my old 2015 MacBook Pro w 2 USB 3.0 ports has been painfully slow.