HELP! - First NAS - Questions

Hello,

I am thinking about setting up a NAS.

After doing some research it seems Synology is a pretty solid choice as a brand.

My use:

To access files (music, word, photos) from my MBA and G3 phone from my office imac where I will set up the NAS.

I don't need more than 2-3 TB of space. For my use what model would be best?

Also, am I correct in assuming you only need HDD in these vs SDD because you are limited by your internet speed so the speed of you disk does not matter as much?

Thanks