What is file-version history?¶

File-version history is the provider's retained sequence of earlier states or revisions of a cloud object. It can show how content changed over time and may recover material no longer visible in the current version.

A version is a provider-defined checkpoint¶

Services create versions in different ways. A save, autosave interval, upload, synchronisation event, restore or significant change may create one. Some retain complete snapshots; others store differences between versions or group many small edits together.

Version history may record:

• object and version identifiers;
• creation or modification time and time zone;
• account, application or process associated with the change;
• content, size or hash for the retained state; and
• restoration, deletion or retention status.

History can reconstruct content and sequence¶

If wording appears in V-12, disappears in V-13 and is quoted in a message between those events, the sequence can provide strong corroboration that the earlier content was available. Comparing versions can identify the precise addition or removal rather than relying on the latest file.

Dave edits OneDrive object OBJ-4407. Version V-12 contains paragraph 12 at 14:10; V-13 removes it at 14:22; Teams message MSG-211 quotes the paragraph at 14:16. The versions establish the provider-retained content states and the message places knowledge of the earlier wording between them. Neither record alone proves who typed or removed the paragraph.

Restoring an older version commonly creates a new current version; it does not necessarily erase the intervening history. The provider's behaviour must be confirmed for the service concerned.

The history may be selective¶

Retention limits, plan level, administrator policy, merging and application behaviour can reduce what remains. Absence of an old version does not prove the content never existed, although a complete history covering the relevant period can still be useful evidence.

The account named against a version identifies the actor at the level recorded by the service. Whether version history identifies the person depends on the associated session, device and wider evidence.

The next useful comparison is the version IDs and content differences against save or restore events, recorded actor and application, session and device activity, and any communication using the changed wording.