I have Instagram and Google Drive both installed on my iPhone. I want to post on Instagram some photos from Google Drive. Have somebody any ideas how to do that, because in Insta library I have only photos from my iPhone camera.
To share a photo from your Google Drive to Instagram on your iPhone, you open the photo you want to share (by tapping on it), on the top right you'll see 3 little dots, tap the dots, and you'll get a list of options. Choose the 'Open in' option and that will give you the option to share with Facebook etc. if Instagram isn't there, go to the More option and enable it. Hope that helps - took me ages to work it out!
in gdrive choose the image and in the options menu click send a copy and then open in "copy to Instagram" is a choice
Use “open in” to email it to yourself. Save to phone right from the email, then upload to Instagram from iPhone photos like normal.
The worst part is that you have to email them one at a time as it won’t let you use “open in” on more than one item at a time (the option doesn’t even show up if you have multiple items selected).
(This worked for me on 5/27/18)
Edit: I only had to use this method because I had two photos and one video that I wanted to post in the same post. If you only have one item you can use “share item” directly to Instagram, as another person has commented. :)