FIELD BACKUP LOG - PHOTOS AND VIDEO
Yenra | Revised October 11, 2026
Guide: https://yenra.com/portable-media/

Use one record per card. Preserve complete card contents and internal names.
Keep this record outside the card tree. Retain the card until required
independent copies, integrity checks and content checks have passed.
Do not format an existing source or destination to solve a read error.

TRIP CAPACITY (decimal GB unless recorded otherwise)
Expected new GB/day: ____  Days: ____  Total GB: ____
Desired free fraction of usable capacity: ____ (e.g. 0.20)
Required usable GB per complete copy = total GB / (1 - free fraction): ____
Example: 120 GB/day x 3 days = 360 GB; 360/0.80 = 450 GB per drive.
Two full backup drives each need that capacity: 900 GB combined.
Confirm actual free space, units and largest-file support on each device.
Measured copy time: ____ Verification time: ____ Power plan: ____

SOURCE
Project / date / operator:
Camera / format / card ID:
Expected clips / important takes / longest recording:
Source directory inventory and total bytes:
Reader / computer or copier / OS / software version:

DESTINATION A
Physical device label / file system / free space:
Unique outer folder:
Copy completion / errors / report location:
Verification method, algorithm and baseline (source or verified copy):
Read-back or checksum comparison result / report location:
Playback checks: clips, duration, picture, sound, continuity:
Unresolved issues:

DESTINATION B (independent physical device)
Physical device label / file system / free space:
Unique outer folder:
Copy completion / errors / report location:
Verification method, algorithm and baseline (source or verified copy):
Read-back or checksum comparison result / report location:
Playback checks: clips, duration, picture, sound, continuity:
Unresolved issues:

CARD RELEASE DECISION
Required copies completed and independently verified:
Expected content and playback checked:
All errors resolved or card held:
Release authorized by / date / time, or HOLD reason:
Storage locations for source and two copies:

AFTER THE TRIP
Main archive destination / ingest and verification date:
Separate-location copy / restore test:
Originals, logs and descriptive notes retained together:
Next review date / responsible person:

Reference: Library of Congress digital-file preservation guidance
https://www.loc.gov/preservation/about/faqs/reformatting.html
Integrity and storage framework: https://www.ndsa.org/activities/levels-of-digital-preservation/
Example numbers are planning assumptions, not hardware performance claims.