SSD's come in a lot of flavors and capacities but they only come in two basic types. Single level cell and Multi-Level cell. Multi-Level cell SSD's store two bits of information per cell and are less expensive. The storage of 2 bits of information in each Nand flash cell is harder on the drive and typically each cell can be written and erased 10,000 times. Multi level cell SSD's still last a good long time and provide up to 10 years static storage without power running to the drive. They take a little longer to write because of the complexity of writing two bits of information to one cell.Single level cell SSD's only write one bit of information to each cell and they are considered enterprise class drives and have a much longer longevity. They also write faster because of the simplicity of writing one bit of information to each cell. How much longer do they last you ask, well like we mentioned typical MLC drives write and erase each cell approximately 10,000 times, Single level cell drives write and erase each cell up to 100,000 times. Hence our deduction that Single level cell SSD's can have 10 times the longevity of MLC drives. That longevity comes at a premium price but it's not ten times more for a SLC drive than a MLC drive.