web.archive.org (Wayback Machine) Url Saving Instructions

Step 1:
http://web.archive.org/save/(url to capture updated/new content if necessary [otherwise, skip Step 1])
I'm not sure how fast the archive can download stuff so it might be much longer than a usual download.

Step 2:
If the archive cannot handle your url due to restriction of weird arbitrarily encoding (e.g. can't save %e4;%c4;[;];%f6;%e5;%8;), it might be best to start your own archive account and make an item page as a web archive mirror (alternative) host. That means to download files onto your client computer and uploading them to the specified item page's download directory/directories. Oh yeah, just remember to write down your archived url to the item page description section so people can have the whole enchilada.

Step 3:
Once you are done with saving/archiving your urls, you can access https://web.archive.org/ to start browsing archived sites. Other search bar engines found in archive.org will do. Your mind can ease knowing that your laborious task will bear the fruits of long lasting stable hosting (safe for public files).
Happy browsing on the archives!