A photo prepared for a Snapchat story has a different purpose from an original you want to keep for the future. The sharing copy can use a crop and lighter file size that suit the post. The original remains valuable when you later need another shape, more detail, or a clean source for editing. Store them separately before you begin.
This page selects our 1080×1920 vertical preset for a story-shaped working export. It is not a backup format or a claim that every Memories import must use those dimensions. If retaining the full scene matters more than filling a tall frame, choose Custom and preserve the original proportions instead.
Snapchat's Memories help explains the camera roll import route. Check the controls available in your app. Preparing an image here does not place it in Memories, verify its backup, or change the way Snapchat stores your content after you choose to import it.