Reddit, I opened up my Acer Aspire One (ES1-132) recently in the hopes of upgrading the 32GB SSD. It turns out the SSD is eMMC so it is soldered to the motherboard.
NBGHN11001 NB.GHN11.001 For Acer ASPIRE ES1-132 Laptop Motherboard DA0ZHPMB8F0 REV:F With N3350 CPU 32GB-SSD DDR3 100% Tested OK - www.centurabk.com