Evernote is my digital filing cabinet. I rarely store documents externally
Some users emulate folders using the notebook/tag trees in the sidebar
Personally, I don't find it faster and am happy to use tag methodology for organization
>>backed up to dropbox, google drive and / or my NAS
Evernote is useful as a backup service, with data uploaded to the servers and copies on all my devices.
I also have Personal backups running on my Mac; daily incremental, weekly full, and Time Machine,