Google- and OneDrive

You can provide the user with a discrete selection of images for an image input field by integrating a folder from Google or OneDrive (both work in the same way).

Google Drive

Go to https://drive.google.com. Click on "New" and create a folder. Upload your images into the new folder. Once you're done, go to the sharing settings.

Make sure to set the general access to "Anyone with the link" (otherwise it won't work).

Then copy the link and paste it into the parameter of the image input field.

Here is what this looks like, once your done: