Keep three copies: your working files and two backups. Separate the storage, keep one copy off-site, and test that you can recover a file.
Understand the 3–2–1 idea
The traditional rule is three copies of important files, on two types of storage media, with one copy off-site. The purpose is separation: one failed device or incident should not take every copy with it.
A practical household arrangement is the verified delivery on your computer, a copy on an external drive, and an off-site cloud backup. Two folders or partitions on the same physical drive do not protect against that drive failing. A different drive brand is not a different media type.
Make and check an external copy
Connect a drive with enough free space. Copy the complete delivery into a clearly named folder such as “Family Celebration - Final Delivery.” Copy rather than move it so the original stays in place.
After the transfer finishes, open files directly from the external drive and compare the folder contents with the original. Safely eject it when finished. Keep the drive disconnected when it is not being updated or checked.
- Label the drive with the event and backup date.
- Keep the original file organization.
- Store the drive somewhere dry and protected from accidental damage.
Keep one copy somewhere else
An off-site copy protects against an incident affecting your home or office. A cloud backup or a separate drive stored securely at another location can serve this purpose.
For a cloud service, check that uploads have completed and find out how deleted files and older versions can be restored. Use a unique password and multi-factor authentication. Keep account recovery information somewhere you can access if your computer fails.
Do not confuse syncing with backup
Syncing keeps locations in step. Depending on the service, deleting or changing a file in one place may also change the other copies. A folder that appears on two screens may still be vulnerable to one mistake.
Choose a backup arrangement with recovery options you understand, and keep a disconnected copy as another layer of protection. Do not count a delivery link as your permanent archive; confirm its availability and save your own copies.
Practice recovering a file
Try restoring a photograph and a film from the backup to a separate test folder. Open them and check picture and sound. This tests more than whether a backup screen says “complete.”
As a simple habit, review your backups a few times a year and after changing a device or account. Check drive connections, cloud access, and available storage. Replace unreliable storage and migrate files before you lose the ability to open them.