You might want to clarify your statement of your initial quantities.

I (perhaps carelessly) first read "100mb 60k rows)" as 1 x 10⁶ (aka '1.e+6' aka 'one million') rows, each with 10 columns. Unless most of the columns contain only a single character (or something close thereto), you're looking at a lot to slurp ... which see using Super Search here.

But a "mb" can mean 1024² bytes or 1,000,000 (decimal) bytes (often used by manufacturers of hard disks and computers to exagerate the size of their product)... and in any case, it's not conventionally used to [state|discuss|evaluate] a pure number.