I just won a ps4 from a raffle at my job and I am considering buying PES 2017 because it has option files. I have never owned a PES game and have no idea how to download the clubs that aren't licensed in the game. Juve isn't in the game so if I can't download something I definitely won't buy it. Also I read something in this thread about downloading our primavera as well. Could someone help me and explain it in the simplest way possible lol? I've just never owned a PES game ever and I don't want to buy it if I can't play as Juve. I know @Osman and @JuveJay have this for ps4 and are very helpful members

any help would be appreciated
It's not easy to explain but once you've done a couple of options files it is easy stuff. Basically on PS4 you can import entire teams having just downloaded them to USB. You plug in and then import them through the edit menu. There are good option files out there because the editing community is huge. The best one this year and most regularly updated is the DFL Option File:
http://www.pesgaming.com/showthread.php?t=100497 1st post should give most info.
Note that you need to be updated to patch 4.0 in game to use the relevant option file (in this case 4.2). You need a clean USB stick (2GB always works) formatted to FAT32 or ExFAT (try the first, if that doesn't work then try the second).
Ultimately you want to download the option file and then on your USB stick all you'll have on there is a folder called 'WEPES', inside it will be all the imported teams, emblems etc. These even include edited player data, team formation (these are the .bin files) giving updated formations, set piece takers etc.
When you go to Edit > Import data you then have to tick boxes for .bin files that you want to import, which will be called a team name. Each team takes a few seconds to import, so all the teams in the game might take 20-30 minutes. I would advise doing it in blocks of 10-15 teams, as it has been known to crash at times. If you get any errors coming up saying that image cannot be imported then make a note of the team and kit or logo and then you can also import images individually through the import page. You'll find that the image has probably been corrupted when downloaded, so you might have to create a subfolder in 'WEPES' called something else and add the missing logos you need. If you do have any missing logos give me a shout.
Any problems just ask a question in here.
Juve are actually the only Serie A team without an official license in this game (because FIFA bought it), but you can edit most things to look authentic. No in-game 'Juventus' commentary or J-Stadium, which I find I don't miss much.
As for the Primavera, I created the team which overwrites one of the fake teams in the fake leagues:
http://www.juventuz.com/threads/41535-Pro-Evolution-Soccer?p=5401352&viewfull=1#post5401352
*BEWARE* - when you start using individual squads that people have uploaded it can badly mess with existing options files you have, because the same fake players could be used by both editors. This is one of the biggest problems with PES editing, which is why a lot of editors are teaming up now to avoid overlapping edits.