Backup to external HDD + mikrotik?

Question

Backup

It is necessary to organize a backup in a room remote from the server room.
So far, I'm considering MikroTik RouterBOARD 951G 2HnD + WD My Passport 4TB as a temporary solution.
Mikrotik will have ftp or samba.
Questions to which I can not find answers:
1) will Mikrotik see all 4TB and will it even see this hdd?
2) will it withstand a load of 20gb at lunchtime every day?
3) will the 200-300gb archive be copied to this crutch?

Answer 1

1) Shouldn't be a problem.
2) Not a fact.
3) Where will it go, of course it will be copied, the only question is how long it will take.
In general, it will work but slowly and sadly. Well, a wild load on the router, which does not allow it to perform its direct duties.
If there is ftp everything is better, but it is also a crutch in Africa.