Use these best practices to organize your member files in Vault.
Member Files
Do not use Proxy library folders or Vault library folders. Vault solves read/write access by default and with more flexibility, so a more sophisticated setup is not required.
Save Custom iPart members in the default member location to avoid issues with migration, move, and rename.
Default Location
The default location is defined by Family File Location + subfolder = family name.

Vault Categories
Classify members as a Configuration Member in Vault.

Classify Factories as Configuration Factory in Vault.
