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It's not the first time when I'm checking the P:, S: and Z: drive, but I never worked with them. For the first time placed a file on S: drive and after that I deleted. At work I don't have a personal computer so I can't work with P:, S: and Z: drive as much and I can'tdelete something what is not mine.
In September 1956 IBM launched the 305 RAMAC, the first computer with a hard disk drive (HDD). The HDD weighed over a ton and stored 5MB of data.