new speakers, an audio interface, cables, case for the ddj, records or a turntable, a new table, an SSD or reliable set of flash drives.

I would go with a set of 2 500gb m.2 nvme drives + 2 of these enclosures

https://www.amazon.com/Blue-SN550-500GB-NVMe-Internal/dp/B07YFF3JCN/ref=sr_1_6?dchild=1&keywords=nvme&qid=1608619779&sr=8-6&th=1

Something like this. Wait till the holidays to order.

Samsung for Speed but Little expensive and then WD for Cost to performance

Amazon.com: Western Digital 500GB WD Blue SN550 NVMe Internal SSD - Gen3 x4 PCIe 8Gb/s, M.2 2280, 3D NAND, Up to 2,400 MB/s - WDS500G2B0C: Computers & Accessories

Amazon.com: Samsung (MZ-V7E500BW) 970 EVO SSD 500GB - M.2 NVMe Interface Internal Solid State Drive with V-NAND Technology, Black/Red: Computers & Accessories