At that time, C60 or, better still, C90 cassettes were used for recording. Later, when the first SDR receivers appeared, the “hard drive” could not be large enough. Nowadays, these mechanically vulnerable, relatively slow but cheap HDD disks are being replaced by affordable SSD storage. That’s why my station computer is now getting a Samsung 990 PRO NVMe M.2 SSD with 4 terabytes of storage and sequential read/write speeds of up to 7,450 MB/s and 6,900 MB/s, respectively, to massively speed up the large amounts of data involved in recording and listening to the mediumwave band. The two additional 8 TB HDDs will continue to be used for archiving.