Single and adapted

. I bought this case for my LaCie - Rikiki - Mobile External Hard Drive 2.5 "- USB 3.0 - 1 TB, and it fits like a glove that particular disc dimensions are 11.9 cm long, 7.5 cm wide and 1.9 cm thick, but there is a little room, and the case must contain carefree hard drives ranging in size up to 12.5 x 8 cm , 0 cm x 2.0 cm.

This case has a rubber band to hold the hard drive, and an elastic net to hold the cables.
It is small enough not to double the size of the disk, and I think sufficiently robust to protect the drive.

The zipper seems quite reliable, according to the brand's reputation.
In short, I recommend this product without reservation.