I have an 8 TB HDD in my iMac, so I wanted something bigger in the Time Capsule. I installed a 12 TB Seagate hard disk (Seagate ST12000NM001G HDD 3.5″ 12TB SATA 3.0 7200RPM Enterprise Hard Drive). I had to trim the two top rubber segments to fit the disk. It is working fine and Time Capsule did the initial Time Machine back-up of nearly 5 TB of my data which took about four days to complete. So far so good.

I have an 8 TB HDD in my iMac, so I wanted something bigger in the Time Capsule. I installed a 12 TB Seagate hard disk (Seagate ST12000NM001G HDD 3.5″ 12TB SATA 3.0 7200RPM Enterprise Hard Drive). I had to trim the two top rubber segments to fit the disk. It is working fine and Time Capsule did the initial Time Machine back-up of nearly 5 TB of my data which took about four days to complete. So far so good.

I broke one Time Capsule trying to remove connectors 2 and 3. I was impatient and broke connector 3.

Later, I bought a new-old-stock Time Capsule and I used Lojza’s method with the needle. That worked. Be patient with the needle to find the tiny slit between connector and board to pry the connect off.