Yes, in most cases the NAND SSD in an [link|https://www.lenovo.com/us/en/faqs/intel/intel-evo-platform/|Intel Evo platform|new_window=true] laptop can be replaced with a higher-capacity SSD. This is often referred to as "upgrading the storage." The process of replacing the SSD typically involves removing the bottom cover of the laptop, locating the SSD, and physically removing it, then installing a new SSD in its place.
It's important to note that the process of upgrading the storage can vary depending on the laptop model and manufacturer, and it is generally recommended to follow the manufacturer's instructions for performing the upgrade. Additionally, some laptop models may have specific requirements for the new [link|https://www.lenovo.com/us/en/dc/accessories-and-software/memory-and-storage/memory-and-storage-hard-drives|SSD storage|new_window=true], such as the form factor, interface, and performance specifications, so it's a good idea to check the laptop's manual or manufacturer's website for compatibility information before making the upgrade.
It's also worth mentioning that upgrading the storage in a laptop can void the warranty, so it's a good idea to consider this before proceeding with the upgrade. In some cases, the warranty can be reinstated by installing the original SSD back into the laptop.