Hello @All-Father and welcome Congratulations on the new computer and have fun with it. you have installed an SSD M.2 PCIe hard drive on the board B560H6-EM and can install another M.2 PCIe there, the board also has three SATA slots and there are also enough power connections to connect additional HDD/SSD hard drives. There are also spaces in the INWIN 301 housing to fasten them. Goodbye Fishtown see also here, same board and housing https://community.medion.com/t5/ERAZER-Gaming-PCs/Erazer-P10-MD-34585-Anleitung-und-Daten-%C3%BCber-Mainboard-ECS-B560/m-p/131300#M4828
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