10. A non-transitory computer-readable medium, excluding transitory propagating signals, storing instructions that, when executed by a computing device, which comprises one or more processors and computer memory, cause the computing device to perform operations for content indexing of data files being archived, the operations comprising: executing an indexer that, in the course of one or more data files being archived to respective archive copies, indexes the one or more data files according to content attributes, including at least one of: textual content, picture content, video content, and audio content, wherein each archive copy is stored offline relative to a user computing device that is distinct from the computing device executing the indexer; (a) associating by the indexer content attributes with respective smaller portions of each archive copy, (b) for the one or more data files being archived, generating by the indexer a searchable content index of associated content attributes relative to the smaller portions of each archive copy, and (c) associating by the indexer the content index with the respective archive copies; and executing a search filter that is configured to: (i) search in the content index for one or more search criteria received from the user computing device, (ii) cause only smaller portions of respective archive copies that satisfy the one or more search criteria, to be mounted to the user computing device, wherein archive copies and smaller portions thereof that do not satisfy the one or more search criteria are not mounted and remain offline relative to the user computing device, and (iii) present in response to the search criteria a fast-forward progression through the mounted smaller portions of respective archive copies that satisfy the one or more search criteria, without restoring the respective archive copies in their entireties to the user computing device.
10. A non-transitory computer-readable medium, excluding transitory propagating signals, storing instructions that, when executed by a computing device, which comprises one or more processors and computer memory, cause the computing device to perform operations for content indexing of data files being archived, the operations comprising: executing an indexer that, in the course of one or more data files being archived to respective archive copies, indexes the one or more data files according to content attributes, including at least one of: textual content, picture content, video content, and audio content, wherein each archive copy is stored offline relative to a user computing device that is distinct from the computing device executing the indexer; (a) associating by the indexer content attributes with respective smaller portions of each archive copy, (b) for the one or more data files being archived, generating by the indexer a searchable content index of associated content attributes relative to the smaller portions of each archive copy, and (c) associating by the indexer the content index with the respective archive copies; and executing a search filter that is configured to: (i) search in the content index for one or more search criteria received from the user computing device, (ii) cause only smaller portions of respective archive copies that satisfy the one or more search criteria, to be mounted to the user computing device, wherein archive copies and smaller portions thereof that do not satisfy the one or more search criteria are not mounted and remain offline relative to the user computing device, and (iii) present in response to the search criteria a fast-forward progression through the mounted smaller portions of respective archive copies that satisfy the one or more search criteria, without restoring the respective archive copies in their entireties to the user computing device. 12. The non-transitory computer-readable medium of claim 10 , the operations further comprising: executing a playback agent that, in response to a request for playback of a first smaller portion of a respective archive copy presented in the fast-forward progression, causes the first smaller portion to be restored to the user computing device from a secondary storage device comprising the respective archive copy.