This message was posted on behalf of Intel Corporation
We understand you have some questions regarding the firmware version of your SSD and if it is the correct one.
First of all, the tool is reporting correctly the version of firmware on your SSD, the 240GB and 256GB are not the same SSD, these are different.
In other words, your SSD is using the latest firmware as of today.
Please let us know if you need anything else from us.
Following page provides different information > Intel® SSD 540s Series (2.5-inch) Product Specification
Capacities: 120, 180, 240, 360, 480, 1000 GB
There is no capacity of 256 GB, neither 512 GB. As you already know, the real sizes differ due to power of 1000 rather than 1024.