This article seems to be confused or maybe just grinding for SEO. Eg the section "Difference Between Flash and SSD Storage" doesn't cover the question, just has

This article seems to be confused or maybe just grinding for SEO. Eg the section "Difference Between Flash and SSD Storage" doesn't cover the question, just has random flash facts and then makes some confused distinction based on form factor. SSD is a higher abstraction term covering storage technologies like DRAM, SDRAM, and XPoint in addition to flash, and implies there's a storage management layer that presents a block addressable interface (like SATA or NVMe or USB storage etc). This layer also known as a FTL. The non-flash part is not practically very relevant those are extremely niche or extinct. But the abstraction part is relevant, some flash storage presents as SSD and some doesn't. For the latter the device storage driver stack needs to have more intimate flash device knowledge, and using specific flash device filesystem. In the context of FlashDB, it supports raw flash without the SSD abstraction. This is to be expected as tiny embedded devices typically have raw flash and not SSDs. Eg here: https://armink.github.io/FlashDB/#/demo-esp8266-spi-flash https://armink.github.io/FlashDB/#/demo-esp8266-spi-flash