GonnaCatchIT (11/1/2015)
[Our DB size is 450 GB. Does copy DB copy the data as well or only the database objects.]
Sorry, poor use of terminology, by "copy-database" I meant a database restored from a backup, so it would be the full database including all data and objects.
[No , not using compressed backups. We dont have control over the DB servers, there is a different team that handles this]
I suggest you ask the other team to turn on compressed backups, so that the transfer time, and restore, is as fast as possible.
Sounds like just re-restoring the Full backup and then the latest Differential is what you need.