Please say what dirs on storage use for archive** only, and dont need to be on ssd?  Processed and resized folders or something else? Or i mistake) Thanks.

Folders with original files aren't used much and needed if resized images are lost or need to be regenerated, for example these folders can be moved out of SSD:

bx_ads_videos
bx_albums_files
bx_photos_photos
bx_posts_videos
bx_timeline_videos
bx_videos_videos