Backup more than one DB File in a moment.

Hi.

We have one high performance server with 20 TB SQL database on it (MSSQL 2012).

DB data stored on SAN storage in 6 filegroups (summary 60 files) for storage load balansing.

Native SQL Full backup to a dedicated storage takes about 7-8hrs depending on a DB processing load.

DPM(2012 R2) Express backup(to a dedicated DPM server with dedicated storage system using 10Gbps network) takes about 50-60hrs depending on a DB processing load.

DPM Express backup replicating only one DB file in a moment.

1. So, is there any solution, how to backup more than one DB file of a single database in a moment?

2. Can you help us with understanding of next DPM Registry parameters?

Thank you!