New User Company file upload

[Deleted User]
[Deleted User] Posts: 0
edited August 2019 in Accounts Hosted
I have created a new user with a new username and when i login it is asking me to open an existing company file do i need to go into single user mode to download a backup to have to upload this? Once i do this will this give them full access to our accounts? I dont know if I am doing this correctly.