What does seek do with solid state storage?

Solution 1:

if you're referring to linux, seek still moves ahead the required number of bytes. For example:

dd if=/dev/zero of=/dev/sdb bs=512 SEEK=2

Will start copying zeros 1024 bytes into the start of a disk, it doesn't matter if sdb is an sd card or ssd drive, because of a little thing called abstraction the actual mechanics of this is taken care of at a lower level.

Update

I see what you're saying now. Following my sd card example, flash memory uses something called pages, and the pages come in a particular size. when a seek comes, the OS sends the command to the sd card/ card controller to move to a certain page for reading and writing.