Windows: If you want to back up all of the photos and videos you've uploaded to your Instagram profile, InstagramSaver makes it easy. You can also download the public libraries from other accounts you follow, like sports teams or celebrities.
Once you've downloaded and installed the software, all you need is your username. Once it get's started, the process can take anywhere from a couple minutes to a lot longer depending on how much stuff you've posted. You can even run it again later and it will skip over media that was already downloaded, making it easy to update your files. Hit the link below to download.
InstagramSaver | SourceForge via Ghacks