Splitting the database

My current setup is:

- DK 8.8.0 appimage with the db on the laptop and all the photos on an usb external drive.
- SQLite db.
- I currently have have over 50k images and only 8k to 10k are to be keepers.
- Every image has a corresponding XMP.
- I use DK only for the DAM functionality. I use Darktable and ART
  for editing the photos.

I just bought a second internal SSD (2tb) for my laptop.

I want to split my images between the 2 drives:
- The keepers to go to the 2nd internal SSD.
- The others to stay on the external USB drive.

What's the better option?

a: 1 single database: 2 albums. 

One album for the keepers (always online) and another album for the
others, rarely online. Any change to the 'non-keepers', like keywords
or labels, and I would have to connect to external USB (not too often).

 b: 2 databases with 2 different desktop shortcuts with
--database-directory <dir> and --config <config>


Thanks


-- 
sknahT

vyS