Ok so basically I have my Synology on, open finder then open attached NAS and start dumping my files into it right? I have the Synology set up as Hybrid, so basically one big drive with only one volume. Do I just dump all my file types into it, do I need to do anything special for music, pictures or video files that I move into the NAS? I did try putting some files on NAS by dragging and copying and then access them via iPhone with app but pictures don't show thumbnails and only some videos play, such as mp4 but things like avi won't play, I can only download and not stream.
For music, I want to keep the files on NAS as my iTunes library, just move music files to NAS or do something special?
You need to ensure that you have activated the Mac File Service.
Connect to your NAS via your browser and log in as admin. Go to Control Panel > Win/Mac/NFS and put a tick in the 2 boxes.
Your NAS comes pre-configured with 3 system folders; music, photo and video. Connect to your NAS via your browser and log in as admin. Go to Control Panel > Shared Folder and make sure that each user has the correct permissions to use those folders. I'm assuming that you have already configured your users for the NAS with the SAME short user names that you have on your Mac.
For your music you need to once again go to Control Panel and go to Media Server and then the Indexed Folder tab. Ensure that the three default folders are showing and are indexed. You then need to configure the iTunes server. Go to Control Panel > iTunes and enable the iTunes Service. Give it a shared name that will show up in Finder on your Mac, I called mine NAS but you can call it DiskStation or anything you want.
You can then place your music files in the music folder on your NAS and point iTunes on your Mac to the /music folder on your NAS.
I have a DS1511+ and this is my first NAS. I find it easy to manage and it usually loads all types of media as fast as if it were on my local Mac. I have around 16,000 songs and a few hundred movies/tv shows loaded on my NAS. From a re-boot of my Mac, when I open iTunes on my Mac and click on my NAS in the left hand pane, it takes about 60 seconds to load up all 17,000 items. If I then quit iTunes and re-start it 60 seconds later, it finds all my NAS items within seconds.
To sum up, the areas you need to check are that
1. You are using disks that are supported for your NAS check the Synology website for this.
2. You have created a volume correctly for your needs (I suggest you start with the default setting of Synology Hybrid Raid with data protection if 1 disk fails)
3. Enable those three default directories onto that volume 1
4. Create the users and give them appropriate permissions
5. Set up the media server
6. set up iTunes
7. enable the mac file service.
8. From your Mac dump some media files and check the responsiveness of the system.
There is a lot of detail that I have missed out but these are the broad main steps that you need to look at.