@Tha C-Master you indeed need 2x 8GB sticks. You should consider getting a second battery for T901 if you didn't already. T901 has smaller main battery than e.g. T902, but second battery is about 2/3 capacity of main (whereas it is ~1/3 for T902 and newer T7XX), pushing total battery capacity over 100Wh - that way you'll finally achieve respectable battery life. You can use m.2 SATA drives in T901 with a simple adapter. I suggest this adapter - while not the cheapest, neither SSD nor the adapter itself will wobble.