That’s the spirit!
pieces store is the current method where there are millions of small files.
hashstore will compact the files into “logs” of 1GB each to better handle massive file accesses and bulk deletes, etc.
If you feel sassy you can beta start migrating a node or two:
[Tech Preview] Hashstore backend for storage nodes - Product Discussions / STORJLINGS - Storj Community Forum (official)
Hashstore Migration Guide? - Node Operators / getting started - Storj Community Forum (official)