Does this artist make static or animated scenes?
Okay, a little background because I've known this creator for years...
He used to make SD using timeline or Piston on his previous Pixiv account (the one that got taken down), but they were very short or looped (with some exceptions). Currently, he makes static SDs, but within each SD, he separates models and poses into folders:
One SD can contain the same character loaded three times in three different folders and in different poses, using the Ugly Bastard format.
That's why a single SD weighs over 100 MB or more. Of course, you're free to modify them and separate the folders per SD, but that's up to you and depends on your PC's performance.
Of the SD cards I've shared, two from Frieren and Fern contain animation, and all of Stellar Vermillion's.
Others also have animation, but it's just camera movement.