I put an ssd in too. It is useful. I also bought a €20 usb optical drive.
A cd drive always makes noise. Plus that it causes jitter. It’s better to rip your cd’s. It is easy and once you did that you can stay seated on your comfy chair or couch. It’s more convenient and sounds better.
You can approach the rose disk from any computer or phone using a file manager through the network. I can load it from my android phone using x-plore app. Once you formatted the ssd and set up the smb functionality.
If you have lot of flacs on your pc it is indeed the fastest option to let the rose format the ssd, then take it out and insert it into your pc. Copy all media files you like and then put it back in the Rose. Then it will build the new database. Later you can add incrementally through your network. Slower but convenient.
Once you have this all figured out you’ll be glad you did. Startup issues will soon be forgotten.