bytes_human(
size) ->formatted
Format a byte count as a human-readable string with units
Selects the largest unit for which size is at least 1 unit:
TB (≥ 1024⁴), GB (≥ 1024³), MB (≥ 1024²), KB (≥ 1024). Values below
1024 are returned as "N B" (no decimal). All other values are formatted
as "%.2f UNIT" (two decimal places).