Can PC slow down even if I plug in a lot of hard disks?

I'm using a hard disk right now.

I'm going to add another large-capacity hdd and continue to use the old one for storage.

If this happens, there will be a total of three hard disks.

Can the PC slow down even if I plug in a lot?

I thought it would be meaningful to plug in ssd if it gets slower.

269 2018-12-17 Gentleman

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