Time Machine: Two 5TB 2.5 Drives or One 10TB 3.5 Drive?

[Dembo]

I am using Time Machine as local and Backblaze as my remote backup solution. I would like to increase my backup storage capacity to approx. 10 TB to ensure that external SSDs containing photos and Insta360 videos are backuped too. My current Time Machine drive is a 5TB external 2.5'' HDD and I am wondering whether I should

• get a second 5 TB 2.5'' HDD (takes up less space, quieter, but I don't even know whether backing up to multiple HDDs with Time Machine is possible and reliable)
• replace the 5 TB 2.5'' HDD with a 10 TB 3.5'' HDD (takes up more space, louder but might be more reliable)

Any thoughts on how to proceed?

 

[Bigwaff]

Time Machine supports multiple backup drives. It will alternate backups across the multiple drives.

 

[Apple_Robert]

Consider getting a NAS. They are more reliable, better with data retention if something bad happens (provided you use the correct RAID) and not really noisy.

 

[Dembo]

Consider getting a NAS. They are more reliable, better with data retention if something bad happens (provided you use the correct RAID) and not really noisy.

Thought about going the NAS route but for now Time Machine + Backblaze seems to offer the best combination of onsite/offsite backup and space requirements.

 

[TinyMito]

I'm using a different solution. Custom Pi4 NAS 5-bay of 4TB.

1. Time Machine back up to 4TB Custom NAS.
2. 4TB Custom NAS daily rsync to another 2nd 4TB within the NAS.
3. Also use rclone to backblaze b2.

Total I have 3 copies of redundancies. 2 local and 1 in cloud.