A:Answer JMAN,
Thank you for your interest in this CLX SET system!
As currently shipping, the motherboard, as currently shipping, has a total of 8x SATA 6GB/s ports, and the chassis has 2x 2.5" bays, and 2x 3.5" bays, with 1 of each available. There are also 2x M.2 slots for storage devices, So, depending on the type of drives, it could accommodate up to 4 additional internal drives.
As to the maximum TB HD capacity, this will depend on the combined capacity of the drives you choose to install.
The system has 8 memory slots, with a maximum memory capacity of 128GB.
Modifying the configuration does *not* void the warranty for Free Lifetime Technical Support we at CybertronPC provide.
Thank you, and if you have any additional questions, please do not hesitate to ask!