To solve your macbook running out of space on the original SSD, with NVMe drives, you must update to 10.13 High Sierra or later before upgrading the SSD, as the computer's firmware needs to be updated first. Your SSD won't work without an update first.
Package include:
1x M.2 NVME SSD Convert Adapter Card
1x Screwdriver
3x Screws
This adapter is compatible with the following MacBook Models
(Note: requires macOS 10.13 High Sierra or later)

MacBook Pro:
2013 MacBook Pro Retina A1398 A1502 (ME864 ME865 ME866 ME293 ME294);
2014 MacBook Pro Retina A1502 A1398 (MGX72 MGX82 MGX92 MGXA2 MGXC2);
2015 MacBook Pro Retina A1398 (MF839 MF840 MF841 MJLU2 MJLT2 MJLQ2);

MacBook Air:
2013- 2014 MacBook Air A1465 A1466 (MD711 MD712 MD760 MD761);
2015 MacBook Air A1465 A1466 (MJVM2 MJVP2 MJVE2 MJVG2 MMGF2 MMGG2);
2017 MacBook Air A1466 (MQD32 MQD42 MQD52)

and MacBook Pro ME252 MD878 for iMAC A1419 (Later than 2013 and newer).

Support Following M.2 (NGFF) PCI-e SSD:
Intel: 600p, 660p, 760p etc
Samsung: 960 Evo, 960 Pro, 970 Evo, 970 Pro
WD Black NVME SSD V1, V2, V3
Toshiba: XG5
Crucial: P1
Kingston: A1000, A2000, KC1000
Corsair: MP500, MP510
HP: ex920, ex950
ADATA: SX6000, SX8200 and Pro
and more…