What storage options does the ASUS PN64 offer?

The ASUS PN64 pairs a PCIe Gen 4 x4 NVMe M.2 2280 slot for fast boot and app loading with a 2.5-inch SATA III bay (7mm thickness limit) for bulk storage. There’s no second M.2 slot, but the single NVMe lane is plenty fast for a mini PC.