I checked the Gallery app and found no way to find images elsewhere on my phone. I understand that there's only one copy of each image on my phone - but, on Instagram, I can only post images from my Gallery.
In addition to some excellent points made by
@svim and
@Hadron, I want to point out the use of the word/name 'Gallery' in your posts, and how it may be muddying the waters.
Gallery, as a generic term, just means a collection of images.
Then there are gallery apps--some of which may actually be named 'Gallery.'
And then there's the 'Gallery' you're seeing when using Instagram. IG can't know
which gallery app you use. So let's say that yours is actually called Gallery. That doesn't mean it's the same 'Gallery' IG is looking in.
I know from certain apps I use that when I initiate uploading an image, they display a list of locations to pick images from, including 'Gallery.'
But I have no app by that name. Opening it reveals that it's simply a collection of all the images on my device.
So, for clarity, I'd like to know a couple of things. Is your gallery app actually named Gallery? (Mine isn't--it's called F-Stop Pro, and no app I use that uploads images ever lists it as a location.) Did you install it, or did it come with your Samsung?
When you're attempting to upload images to IG, what happens when you select the 'Gallery' location it shows you? Are all your images there? Only certain ones? None?
I also want to reiterate that moving images around and, especially, changing their names, can be a very bad, very dangerous idea. I *am* very tech-savvy, so it's not an issue for me, but I can see all sorts of potential problems for someone who's not really sure what they're doing.
Finally, simply changing a file's name from 'image.png' to 'image.jpg' doesn't make it magically visible! Its ability to be 'seen' by an app depends on that app's ability to interpret various file types.
When I'm creating an image [using a graphics program], I have control over which image type to save it as. The different types, e.g., JPEG, GIF, PNG, etc., have their own specifications, characteristics, quality, and more. To actually
convert an image from one type to another is not as simple as changing its name. That must be done using a graphics program, image editor, image converter, etc. You may still be able to view an image whose name you changed to a different type, but you won't gain the specific attributes that kind of file should have.