Since High Sierra Upgrade - iMac Retina 5k 2015 is Freezing over and over (no beachball) - Finder doesn't show music artwork 9thumbnails or preview pane) - Samsung Smart-switch no longer connects to my S7 edge (tried updating drivers etc)....

Hi guys, new to the community here so this is my first post....

I have been having a few issues with my iMac since the new OS (High Sierra) update, can anyone please advise of any fixes to these issues....

1. Artwork not showing in Finder for music files (thumbnails and/or an image in the preview pane) all the correct boxes ARE checked in Finder options... other file types such a jpegs, docs, movies etc. ALL show artwork in finder with no problems (thumbnails & preview pane)

2. iMac randomly Freezing (with no beachball) then after random amounts of time is responsive again

3. Samsung Smart-switch no longer connects to my phone (reinstalled software & updated drivers etc still not working/connecting properly)

I also have a report from EtreCheck but can not see how I can copy and paste here with my original entry, so I will add once I figure that out (hoping I can add in a comment below or something)...

The report says my machine is "performing" at "below average" no idea why this is unless it is due to the mentioned issues I am trying to resolve... It is a relatively "new machine" & was working flawlessly until my 'HIGH SIERRA' "upgrade" then nothing but problems....

Of course I appreciate teething problems are expected with a release of a new OS - but really hoped for less than what there has been, not to mention ALL the other "issues" so far with 'High Sierra' others are discovering...

Lastly, I have already reinstalled the OS to see if that fixes the issues, as well as spoken with 'Apple' about the artwork now missing in 'Finder' (apparently they are working on it)...

I have also installed the latest recent update/patch for the OS yet still no changes with the mentioned issues...

Many Thanks,

James