Need to transfer private/public ket from another server

Need advise as I'm just starting out with encryption.

Background

Server A - has private/public key created for User 1. I have FILE1, FILE2 encrypted using User 1 public key

Server B - has private/public key created for User 2. I have FILE3, FILE4 encrypted using User 2 public key

Requirement

I need to transfer User 2 private/public key to User 1

I have exported the private/public key for User 2... user2-export.asc

I have transferred the private/public key to User 1

Question

1. After using the command "pgp --import user2-export.asc", can I now decrypt FILE1, FILE2, FILE3 and FILE4?
2. Will the import create any problems for me?

Thank you for any clarifications provided.