Yes, you can. When you set up your new reMarkable, make sure you follow the instructions at My reMarkable, to ensure that all your files are transferred from the old device.
How to transfer your files from reMarkable 1 to reMarkable 2
Can I use my reMarkable 1 account on reMarkable 2?
Yes, you can keep your existing my.remarkable.com account. That way, you will also keep your existing files, and you will be able to transfer them seamlessly across to your new device.
When you set up your new paper tablet, make sure you follow the instructions on the website closely to ensure all your content transfers safely from the old to the new device. If you want to pass on your old device to a friend or family member, then we recommend that you reset it, and create a new cloud sync account, so that its new owner can access and import their own files.