@leocg Almost every site, of all sites I've tested (mediafire, mega, google drive & other sites), only google drive (sometimes) worked properly, I've already disabled my only extension (AdBlock) and I've already tried to disable my Windows Defender, but the download continues slow

I already use Opera for a while and sometimes, the download speed is normal (12Mb/s, like in Chrome) but almost every time I try to download something, my download speed is 400 kb/s...
I've already seen a lot of topics and it always say about Opera Turbo, VPN and AdBlock. All 3 are disabled but the download speed are still slow