Query: I would choose a Macbook Air as a replacement with 128GB data.
(Renewed) Apple MacBook Air MJVM2LL/A 11.6 Inch Laptop (Intel Core i5 Dual-Core 1.6GHz up to 2.7GHz, 4GB RAM, 128GB SSD, Wi-Fi, Bluetooth 4.0, Integrated Intel HD Graphics 6000, Mac OS)
Apple MacBook Air MC965LL/A 13.3-Inch Laptop - 128 GB SSD, 4 GB RAM, 1.7 GHz Intel Core i5 Dual Core Processor, Mac OS X (, Good Condition)(Refurbished)