HTC One internal storage performing very slowly Using A1 SD, I can see that my HTC One (M7)'s 'internal SD card' (ie, the embedded storage) is incredibly slow compared to other benchmarks listed by anonymous users for the same phone. I'm only getting  6.68MB/s read, and 2.76MB/s write. However, others are getting 50MB/s read and 33MB/s write (for the same HTC One M7 and the same storage location)

Any idea why my phone might be performing so slowly? And how might I improve its speeds?

Its important to note that I've run this diagnosis because for months I've put up with slow speeds and only now getting around to doing something about it. Quite often when saving a photo or a video it will hang for many minutes. I typically find that performance is worse when the card is nearing on full, but now even clearing out storage doesn't seem to give back much performance.
Resetting my phone did the trick.

This isn't a very good answer, as I don't know the root cause. I'm going to slowly add back apps and see if there's a particular one that might have been a bit IO greedy. So far I've added most back and its still fantastically fast again. Haven't signed into Facebook yet... I've always had my suspicions...