Categorizing products

Hi. Got 1 question about sorting products..I have over 50 000 products which i’d like to categorize manually. Is there any way to do the process the fast way? Im pretty new to this plugin.

For some reason if i choose quick edit and set the product to specific category it doesn’t show there. Choosing edit and then set the product to same category it works… cant figure it out whats wrong with that. However, if theres some another way to do this more quickly please help me out ??

https://www.ads-software.com/plugins/woocommerce/