@CallofDuty MW nolonger fits onto a 250GB SSD and cannot be updated.....@Activision @Blizzard_Ent please split up SP, MP and Warzone. pic.twitter.com/pSZdlSldvK

— Battle(non)sense (@BattleNonSense) October 3, 2020

They have updated the full copy on servers to 219GB. Delete game and redownload.
Textures are then downloaded dynamically during the game (quality to be selected in the graphic options)

Old copy needs 274GB for update process and then it is optimized to 256GB ( with +1 lang ) pic.twitter.com/qPqn2PMv08

— Line Storm (@LineStorm2) October 3, 2020