Run .BAT to switch '.jfif' to '.jpg'. The script can be edited to another file extension. This only affects files within the same directory, with the JFIF file extension.
Technically for a month there I had Frontier FIOS 500Mbps and Spectrum 1Gbps (they got me on Spectrum because it was a little cheaper for double the speed)
I mean what would you really need that fast for tho, 500mb streams 4k fine. 1gb should be fine for 8k eventually. That's what I just switched to Spermrum.