Replacement for WD My Cloud

[Enquiries]

I am a light user of WD My Cloud, which is now old and I'm looking to replace. I store tons of photos, tons of music, few videos, and many documents (docx/pdf/etc). I would like to be able to access all of that wherever I am-home/office/trip on my phone, laptop, PC, etc. I also once had a WD Live TV Hub which could slideshow my photos while playing folders/playlists of music from my music library-all stored on the WD Live TV Hub (including playlists & icons) and displayed/played on my TV.

I'd like to recreate that but cannot really do it with the MyCloud. I've been told Plex might be able to accomodate that, but with what hardware? Would Synology or Qnap work?

Thanks,
ned