Wedding photography - best settings to export?

[JosephGalvan]

Hi,

When I'm exporting my photos which are around 1,000-1,500 photos I get a really heavy folder something like 18-20GB.
I used to work with few other photographers that used to send me files which are about 12-14GB, (this was shot with a 5d and 1X Canon) and with a bit more photos, something like 1,800- 2,000.
So can you tell me how can I export keeping the quality of pictures but lowering the size of files?

Please help.

I didn't find the right solution from the Internet.

References:-
https://bit.ly/2IACjJT
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Thanks