Understanding the effects of folder levels

The number of levels of folders in a vault, possibly controlled by the Field-Path definition, can also affect performance. While folder structure usability from the user’s perspective decreases with as few as 4 folder levels, we recommend not more than 10 folder levels. In addition, try to organize the folders so that there are fewer top-level folders, each of which contains more subfolders, rather than having many top-level folders.