It is relatively easy to increase the storage space of the Lenovo Legion T5, and there are corresponding ports and slots available.

- RAM expansion: The system has four RAM slots, and the maximum memory capacity is 128 GB. You can add additional RAM sticks by using the existing slots or replacing existing RAM.
- SSD expansion: There are several M.2 slots for NVMe SSDs. You can install additional NVMe SSDs without the need for additional hardware. There is also space for an additional 3.5-inch hard drive if you want to add a conventional SATA hard drive.
- Installation: Installation requires removing the side panels of the enclosure and connecting the new storage media to the appropriate ports. It is advisable to switch off the PC and disconnect it from the power supply beforehand.

Overall, the Lenovo Legion T5 offers enough flexibility and connections to increase the storage space easily and efficiently.