SFTP server hosting service?

Hi there,
I’m system staff at a company but very beginner.

I hope someone can give me ideas.

Our FTP server broke down.
Now we are looking for some options what we can replce with.
We are based in Singapore.

We send 3GB video images(BIG) to other countries so we need to use SFTP or other way to do so.

We only need 8 SFTP accounts to send/receive between those 8 people in the different network.

We dont need strage, just simply send and receive.

Having new SFTP server in our office will be expensive….?
I’ve been searching SFTP hosting company but I havent found much in Singapore.

Will it be any trouble to use one in the U.S or somewhere far? (gets very slow?)

Please give me some ideas and options I could suggest…

Thank you.