@Pat Sienkiewicz​ you are right, i moved bit a side i think (external table storage recommendation is without UC). for unity catalog managed tables in metastore which is root storage is recommended. thank you for above post @Ashley Betts​ above pat response will provide you more information.

@Pat Sienkiewicz​ but here i have one question in terms of backup, i do remembered for one of Databricks E2 migrations, we have moved managed table data which will be under /user/hive/warehouse, if that is possible UC metastore managed table migration also should be possible.