Why is storage chunks/size of all not the same as for all snapshots

[snairolf]

In this case, I only have one snapshot and the size of the whole storage and the snapshot doesn’t match:

2020-11-22 17:17:38.053 INFO SNAPSHOT_CHECK 1 snapshots and 15 revisions
2020-11-22 17:17:38.053 INFO SNAPSHOT_CHECK Total chunk size is 1,540M in 1199 chunks
...
xxx | all |                          |       |          |   1106 |    1,481M | 1106 |  1,481M |     |          |

What are the extra chunks used for?

[gchen]

Those can be unreferenced chunks or temporary files not properly deleted. You can run duplicacy prune -exclusive -exhaustive -dry-run to show them.