[sherry-sherry]

The speeds and reliability suck compared to the built-in SSDs, and users will blame slow speeds on the phone. Some Android device makers would not allow apps to be installed in the microSD to combat this, of course users complained.

This card in particular has theoretical speeds of 104 MB/s, the internal SSD on the iPhone 14 Pro SSD is a real-world 1400 MB/s and higher.

[ndriscoll]

As long as it has decent IOPS, that should be fine? 100 MB/s is 5x UHD Blu-ray for example.

For something like a decent camera, you need more, but I'd expect phones would be fine. Most of the apps I have on my phone are in the 15-30 MB range, so a couple hundred ms if you had to read the whole thing to load. Seems reasonable to blame the app if it's slow.

With more space, you could also e.g. keep all of Wikipedia and all of your music on your phone, which will obviously be much faster than web services.

[The_Colonel]

SD card speed is fine for photos, video, music, movies and such, but potentially bad for e. g. apps where you need a lot of random access. You can certainly use SD cards effectively, but you need some knowledge.

[anal_reactor]

I am convinced that phonemakers deliberately make SD card support in phones suck, and then they say "See? SD cards suck. Now pay up for our expensive storage". I bought a good SD card and on my phone it indeed works like ass. But then I plug it into my PC using a cheap Chinese reader and suddenly same card works much, much better. Sure, when you run a benchmark you'll see "Ah-ha! It cannot handle twenty instances of Postgres running at once" but if you try booting Linux from it and doing normal everyday tasks you'll see that the performance is more than enough.

[dzhiurgis]

iCloud is slower than a SSD card