Transcend JetDrive Lite 360

£138 uk.transcend-info.com

This drive fits into your MacBook Pro’s SDXC slot to instantly increase your storage by up to 256GB. We were very impressed with its transfer speeds, clocking 88.4MB/sec for sequential reads and 62.6MB/sec in our write tests. The drive comes with storage included, unlike some rivals that require you to supply one.