The 3-2-1 Backup Rule
The simplest framework for protecting your digital photos. Used by photographers, archivists, and IT professionals worldwide.
Keep three copies of every important file — your working copy plus two backups.
Store on two different types of storage — e.g., your computer's drive and an external SSD or cloud service.
Keep one copy offsite — a cloud backup or a drive stored at a relative's house protects against fire, theft, or flooding.
File Formats for Preservation
Nostalgia saves both original and restored versions in your Library. For local backups, keep a folder of original scans separate from restored versions so you can always re-process with future improvements.
The Four Enemies of Physical Photos
Understanding what damages photos helps you store them properly.
| Enemy | Effect | Prevention |
|---|---|---|
| Light | Causes fading in all print types. UV light is worst. | Store in opaque boxes or albums. Display copies, not originals. |
| Heat | Accelerates chemical deterioration and dye fading. | Store at 60–70°F. Avoid attics, near heaters, or in direct sunlight. |
| Humidity | Promotes mold growth, emulsion sticking, and paper warping. | Maintain 30–50% relative humidity. Avoid basements and bathrooms. |
| Acid | Causes yellowing, brittleness, and brown staining over time. | Use acid-free, lignin-free storage materials. Avoid shoe boxes, newspaper, and PVC sleeves. |
Effect: Causes fading in all print types. UV light is worst.
Prevention: Store in opaque boxes or albums. Display copies, not originals.
Effect: Accelerates chemical deterioration and dye fading.
Prevention: Store at 60–70°F. Avoid attics, near heaters, or in direct sunlight.
Effect: Promotes mold growth, emulsion sticking, and paper warping.
Prevention: Maintain 30–50% relative humidity. Avoid basements and bathrooms.
Effect: Causes yellowing, brittleness, and brown staining over time.
Prevention: Use acid-free, lignin-free storage materials. Avoid shoe boxes, newspaper, and PVC sleeves.
Archival Storage Materials
A small investment in proper storage materials makes a significant difference in how long your physical prints last.
| Material | Use | Notes |
|---|---|---|
| Polypropylene sleeves | Everyday storage | Archival-safe, transparent, affordable. The practical default for most collections. |
| Mylar (polyester) sleeves | Valuable prints | Museum-grade protection. More rigid and durable than polypropylene. Best for irreplaceable photos. |
| Acid-free tissue paper | Interleaving | Place between stacked prints to prevent emulsion contact. Inexpensive insurance. |
| Acid-free boxes | Bulk storage | Archival-quality photo storage boxes protect against light and dust. Available in standard photo sizes. |
| Cotton gloves | Handling | Prevents skin oils from transferring to print surfaces. Essential for very old or valuable photos. |
Archival-safe, transparent, affordable. The practical default for most collections.
Museum-grade protection. More rigid and durable than polypropylene. Best for irreplaceable photos.
Place between stacked prints to prevent emulsion contact. Inexpensive insurance.
Archival-quality photo storage boxes protect against light and dust. Available in standard photo sizes.
Prevents skin oils from transferring to print surfaces. Essential for very old or valuable photos.
Handling Fragile Originals
Wash and dry your hands before handling old prints, or use clean cotton gloves. Oils from skin accelerate deterioration. Hold prints by the edges, not the image surface.
For very old or fragile photos — daguerreotypes, tintypes, ambrotypes — avoid removing them from original cases or frames. These formats are extremely delicate and are best handled by a conservator if they need cleaning or physical repair.
Organizing Your Digital Archive
A consistent folder structure saves hours later. Consider organizing by family branch, then decade: Ramesh Family / 1950s / wedding-1952.tiff. Add a simple text file or spreadsheet with notes about who is in each photo and when it was taken.
Nostalgia's Library, collections, and AI captions do this automatically for restored photos. For your broader archive, even a simple naming convention makes a big difference when you return to your files months or years later.