Nikon FOR Format Card — SD Card Format Fix Guide

What Does This Error Mean?

FOR (sometimes shown as 'For') means the camera wants to format the SD card before continuing.
Either the card is unformatted, the file system is corrupted, or the card was formatted in a different system (computer, another camera).
Don't format until you've backed up any existing photos.
Then format in-camera (Menu → Format Card) for best compatibility.

Affected Models

Nikon D850
Nikon D750
Nikon D7500
Nikon D5600
Nikon D3500
Nikon D6

Common Causes

Brand-new card never formatted
Card formatted on a computer with wrong file system
File system corrupted from improper removal
Card formatted in a different camera (compatibility quirks)
Card near end of life with directory damage

How to Fix It

Check what's on the card before formatting.

If the card has photos you want to keep, don't format yet.
Insert the card into a computer with an SD adapter.
Copy any photos to your computer before formatting.
Once you confirm photos are safe, return the card to the camera.
Format in the camera.

Menu → Setup → Format Memory Card.
Confirm.
The camera erases everything and rebuilds the file system to its specifications.
This takes 10-30 seconds depending on card capacity.
FOR clears once format completes.
Check card compatibility.

Confirm the card is compatible with your Nikon body.
Most Nikon DSLRs support SDHC (up to 32GB) and SDXC (32GB+).
Speed class matters for video — V30 minimum for 4K, slower for stills only.
Cards over 256GB may not be supported by older bodies.
Try a different card if format fails.

If the format procedure fails or FOR returns immediately after, the card is failed.
Cards have limited write cycles and eventually fail.
Try a known-good card.
If the new card works, your original card is end of life — don't trust it for important shoots.
Format on computer as last resort.

If in-camera format fails, try formatting in a computer.
Use SD Memory Card Formatter (free tool from SD Association) — gives best results.
FAT32 for cards up to 32GB; exFAT for 32GB+.
After computer format, format again in-camera for full compatibility.

Frequently Asked Questions

Should I format every shoot or just when needed?

Best practice: format the card after copying photos to your computer.
This rebuilds the file system fresh, prevents corruption from accumulated wear, and starts each shoot with a known-clean card.
Don't format randomly mid-shoot — only after photos are safe.

Can I recover photos from a card showing FOR?

Sometimes — recovery software (Recoverit, PhotoRec, EaseUS) can recover photos from corrupted cards if you don't format yet.
If photos matter, try recovery before formatting.
The format procedure overwrites the file system but not the actual photo data — recovery may still work even after format, but it's much harder.