Critically Endangered small

Digital images with no analogue equivalent stored offline on portable storage devices or on hard disks, especially where there is no refreshment plan or no replication.

Group: Portable Media

Trend: No change

Consensus Decision

Added to List: 2019

Last update: 2018

Previously: Critically Endangered

Imminence of Action

Action is recommended within three years, assessment in twelve months.

Significance of Loss

The loss of tools, data or services within this group would impact on many people and sectors.

Effort to Preserve

It would require a major effort to prevent losses in this group, such as the development of new preservation tools or techniques.


Offline photo collections on CD or DVD

‘Practically Extinct’ in the Presence of Aggravating Conditions

dependence on obsolete or proprietary formats or processes; no replication; no archival function;

lack of preservation capacity; lack of skills; single points of failure; lack of clear stewardship or sense of ownership old or obsolete media; lack of refreshment plan; lack or loss of documentation; overabundance; primary storage is camera or phone

‘Endangered’ in the Presence of Good Practice

Refreshment pathway; routine error checking; replication; resource scaled to size of collection; preservation responsibility understood;

2019 Review

This entry was originally submitted in 2017 and remains on the list though with relationships to a number of other entries, especially in relation to different kinds of portable media.

Additional Jury Comments

Highly dependent on who is looking after the offline media but more difficult over time. There is a lack of granularity in the definition of media so only generic advice is possible such as "make sure you're moving your data to new forms of storage every 5 -10 years". It would be possible to split into different storage media (maybe 100 items long).

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