Plan for storing about 8 to 20 acquisitions at a time on the PC before they go to central storage. Remember that each acquisition will transiently occupy about 3 x the raw data size since in addition to raw data you will have the stitched version, possibly a cropped version version of this, and the compressed raw data. About 12 TB is a reasonable storage size to aim for and you can achieve this with platter or SSD RAID. Err on having less rather than more storage since users tend to leave data on the analysis PC and forget about it, rather than processing it and sending it on backed-up central storage. So you can start smaller and add storage only if you really need it.