I manually download photos from my PC desktop to my iPhone. The photos are in a file on my phone called "From My Mac" even though I do not have a Mac. How can I delete these from my iPhone? There is no delete option.
Pictures that are transferred through a cable from a computer, perhaps with iTunes, can be shown by Photos, but they're not "owned" by Photos. So these pictures can't be edited or deleted by Photos, and they can't be synchronized by iCloud Photos The idea is that they are kept on the computer and transferred to the phone temporarily. One way to delete them is to use the computer to transfer an empty set of "pictures" to the phone, and the empty set will replace the others. In using iTunes for this, it may give the option to deselect the pictures that are already there.
Another way to get rid of all the non-deletable pictures is to momentarily turn on iCloud Photos. You get a scary warning that these will be deleted. When you say OK, then they're trashed, and then Photos will start to transfer the other pictures to iCloud. But you can turn off iCloud and stop the sync before it happens.
If you want to save some of these non-deletable pictures, then you can use "Share" to save them to Files. Then re-import them from Files to create fully useable versions.
Manually downloaded PC photos to iPhone (did not sync), how can I delete these from my phone?
