Instead of a 3.5 "internal hard drive, you can install this 3.5" to 2.5 "SATA adapter to make your 27" iMac 27 "computer faster and more reliable! More ultra-long loading time for photos, videos or any other heavy file to view. This 3.5 "to 2.5" SATA adapter is easy to install. The adapter has a storage capacity of up to 1 TB, which leaves you plenty of space to store everything you want! Your iMac will no longer be slow, and there will no longer be a shortage of storage space. In addition, the performance of the iMac will be boosted!