Problem cold storage 1fichier

Not directly. rclone 1fichier remote does not support storage classes.

You should find out with 1fichier what are conditions to keep file in hot storage. Is it 60 days from time you upload it? - then nothing you can do.

But if it is 60 days from last time you accessed then all depends on definition of access - maybe reading metadata is enough? Then you could have script reading all metadata every week for example.