How do I backup Device Folders and Camera Photos to different Google accounts?

Currently, my camera folder is by default synced to my personal Google account. I would like to back up my WhatsApp Media folder to another account. However, Google Photos settings don't let it do so. They can be backed up to the same account. A method I found after searching is creating another User profile. I am using Redmi Note 10 Pro and have options to create a Second Space, but the crux is that the Second Space starts from no WiFi settings, no apps downloaded, and nothing is set up. Even when I try 'Move data' to move WhatsApp (for both the spaces), all it does is install a fresh WhatsApp. Moving the WhatsApp media folder to the Second Space might be an option. But it's not practical. 1. I want to continue using WhatsApp in the first space itself. So, I would have to transfer manually now and then. 2. The option for 'Move Data' in my device shows only app settings to move. There is no option to move files and folders. Moreover, I am not very sure that a Second Space can really solve this problem. Would backup from Second Space go on when I'm using the first space? I won't be able to spend a lot of time on Second Space, making the backup option yet ineffective. A solution to this problem would be greatly appreciated.