Mongodb Incremental Backup

Hi,

I need to take incremental backup for our system. I searched on the internet and there are so many post for incremental backup. There are some github project or some open source project like percona.

Could you please help us?
What is the best way to take incremental backup? There are 4-5 post on this community but it’s not help us. I think --oplog options is for PITR. --oplog option will not reduce our backup size right?

Is there any way to take incremental backup on Atlas or OPS manager ? I checked official mongodb web site. https://www.mongodb.com/docs/manual/core/backups/ . Below Backup With Atlas section, Legacy backup is taking incremental backup but deprecated. Thats why i want to ask you.

Thanks,
Kadir.

Someone has any advice please ?