I wrote:
I'll be picking up another 90 sq. ft. or so of old
computers tomorrow
morning
That was a typo. It's 90 sq. ft. of old computer.
^ (singular)
Or, looking at it another way, it's 36 sq. ft. of old computer, and
54 sq. ft. of peripherals for it (six disk drives and two tape drives).
However, I'm getting rid of 70 sq. ft. of other, substantially less
interesting disk drives to make room for it.