i run raspiblitz with i think is a raspibolt fork on a raspi 4b 8gb and it took over 2 weeks to sync when i spun it up in 2023 so it can take a long time. what exactly is happening when it locks up? do you mean your ssh session stops responding? can you just make a new responsive ssh session without rebooting? if so you might just need to let it ride do have open lightning channels on that node from before that you need to rescue? if you dont have funds in channels and can recover any on chain funds on the node, it might be worth spinning up from scratch. here is a guess at what your current issue may be: 2tb ssd can need more amperage than a 1tb and the raspi 4’s usb ports can only supply 1.2 amps. (total, either to one device on 1 port, or split between all 4 ports). so the 2tb might just not be getting enough power. try getting a powered usb to sata adaptor for your 2tb ssd. can help you find one if you cant figure out what im talking about