Earlier quoted context omitted.
Apple disagrees, and I would take Apple's advice over some random anecdote. There is no reason that an external photo library would be inherently worse than an internal one. If that person actually did use a hard drive (not an NVMe SSD), then yes, the experience would probably be janky. I don't think modern Apple Photos is built to handle slow spinning rust very well. If someone uses an external SSD with equal or gre…
> I don't think modern Apple Photos is built to handle slow spinning rust very well. Apple's software is garbage so I'm sure you're correct, but modern hard drives can do several hundred MB/s of throughput. How is that not fast enough for a freaking photo application? For Apple not to test/support this use case is inexcusable.
Scanning and accessing a photo library is extremely random I/O and has nothing to do with the peak sequential throughput. Hard drives are awful at random I/O.
If Apple kept proper indexes and thumbnails somewhere (especially somewhere fast, like on an SSD), maybe it would be fine, but I have heard some bad things about Apple Photos on hard drives, so they might not be doing things optimally.