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.
Acer Aspire E11 / ES1 $200 Netbook first impressions + Video
Amazon.com: Deal4Go SATA Hard Drive Cable SSD HDD Connector for Acer Aspires ES1-132 ES1-132-C5XH A311-31 ES1-332 DD0ZHPHD000 : Electronics