The first storage account of a storage provider (the account a recording stored under that provider
is read and written through), or null when the provider has none.
Parameters
providerID: string
The MJ: File Storage Providers id (e.g. an MJ: Files row's ProviderID).
The first storage account of a storage provider (the account a recording stored under that provider is read and written through), or
nullwhen the provider has none.