In today's solid-state world, it has been produced memory with different manufacturing processes . A production process is defined by size to make transistors with. The first solid-state drive that was popular, such as Intel's X25-M used 50-nm memory, but later went over to 34 or 32 nm depending on manufacturer. SSDs, which have been launched in 2011 are using 25 nm, but 20 nm which is the next step of the ladder is still some years away.

One shrinks thereby the transistors, each tiny transistor is physically smaller. It makes the oxide tunnel thinner and thus break faster. this is exaclty why a newer SSD actually live shorter than its predecessor.

For memory manufactured on 50 nm custom manufacturers that "tunnel" could be opened at least 10 000 times. The tunnel is opened every time you save or delete a file, called a cycle. This applies to every single transistor, as there are lots of storage space per 4-CN. 4 KB is the smallest size you can write to a SSD.

When you shrink the technology to 34 / 32 nm and further to 25 nm, this number decreases down to 3000-5000 cycles. Remember that this is the specified number, the minimum value memory to clear. In practice, it can live much longer, ranging from one extra cycle to four times as many.
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