I am doing some testing for very basic DIT duties on an feature length indie shoot, 11-12 days, in about 6 weeks. Mostly single camera (BM Production Camera) ProRes HQ, 4K. Recording to 256G and 480G SSD's. DP would like to offload both audio (24bit, 96K, 3-4 tracks from Zoom H6) and video by scene, then copy the days' work to secured storage at 2 locations each night. See images below for what I am suggesting. Ingest is on the left, a Convergent Design USB3 card reader that can read about 500MBS. Using Shot Put Pro 6 on a MacBook Pro, I am transferring simultaneously to (2) 1T SSD's, using the XXHash 64 Checksum verification. The 1T SSD's are in a OWC disc caddy via Thunderbolt. After ordering the OWC unit I was disappointed to find that it only contains 1 SATA controller for the 2 slots, resulting in a 250 MBS write speed combined when writing to both discs or when transferring between the two in the caddy. Is there a better way to write to two discs simultaneously that I have missed? I'm getting close to 1:1 copy time, that is, 30 minutes of footage takes about 30 minutes to transfer (getting 250-280MBS) which means the tech will have time to do the copy then review files briefly, be sure they open in QT 7 for example before we move company. Then the (2) 1T SSD's will go to two different locations to be backed up over night. On my end storage is to a RAID5 SmallTree 8T Server that gets backed up to a NAS (also Raid 5, 8T) every 24 hours. Files checked again before SSD's get formatted for the next day. If there are any corrupted files we could go back to shooting SSD's in the AM and off load again before format for the days work. Comments and suggestions welcomed.