A Microsoft file hosting and synchronization service.
To copy photos from OneDrive to an external hard drive without changing image quality, download or copy the original files. That keeps the file pixels unchanged.
Two supported ways:
- Download from the OneDrive website
- Open the OneDrive website.
- Select the photos or folders to download.
- Select Download.
- If prompted by the browser, choose Save or Save As and select the external hard drive as the destination.
- Copy from File Explorer after syncing locally
- Make sure OneDrive is signed in on the PC.
- In OneDrive settings, use Files On-Demand > Download all files so the photos are stored locally first.
- Wait until the files show as fully downloaded locally.
- Connect the external hard drive.
- Open File Explorer and go to the OneDrive photos folder.
- Select the photos or folders.
- Right-click and use Show more options > Send to, then select the external hard drive.
- After copying, open the external drive and verify the photos are there.
- Use Eject before disconnecting the drive to avoid file corruption.
If the goal is to keep OneDrive as the working location but store the local OneDrive copy on the external drive, the OneDrive local sync folder can be moved to the external drive:
- Right-click the OneDrive cloud icon and open Settings.
- Go to Account > Unlink this PC.
- Open OneDrive again and sign in.
- When prompted to set up the OneDrive folder, select Change location.
- Choose or create a folder on the external hard drive.
- Complete setup and choose the folders to sync.
Important:
- Do not disconnect the external drive while files are downloading or syncing.
- Verify the copied files on the external drive before deleting anything from OneDrive or the PC.
References:
- Download files and folders from OneDrive or SharePoint
- Move your files to a new Windows PC using an external storage device
- I want to keep a copy of onedrive files on an external hard disk but continue with one drive as a working drive. How do I direct files to download to the hard drive? - Microsoft Q&A
- How do you download everything from OneDrive to your computer, especially old files? An old issues on this is locked without an ability to answer. - Microsoft Q&A