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Upload Limited to 300MB/s if using certain browsers like FireFox for some odd reason:

(Also if you want better speeds{will still be limited to 300Mb/s but a bit faster} type about:config into Firefox browser search bar, then type http3 into the new search bar, then change network.http.http3.enable_qlog to true, change network.http.http3.send_background_tabs_deprioritization to true, change security.tls.grease_http3_enable to true. Then type into the new search bar network.http.http2.send-buffer-size and set it to 33554432 if it isn't already.)

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