Archive document storage is something that companies turn to when space becomes an issue or they need to offsite information for security reasons. Carefully management at this point will ensure that files can be easily retrieved and more importantly shredded when the time comes for this.
These days you can offsite just a few boxes, several hundred or several thousand; depending on your needs. Be careful not to purchase oversized archive boxes as these are too heavy when full and will collapse after a short period of time. Any labelling is best on the end and not the side so that information can be visible once placed into storage.
If you are considering placing your records into store then it would be worth your while visiting Britannia Pink & Jones. You will be able to see how and where archives are stored and managed.