Initial cache bundles

May i store bundles in build on initial stage and update it if remote bundle version updated on cloud storage?
P.S. I ask it question because want decrease time for download remote bundles in first launch

Yes, just set the Update Restriction to Cannot Change Post Release. I know the that sounds like it can’t be updated, but it actually means it will be included in the build, and any future changes will be external, but you won’t be able to delete the original bundles without a new engine build.