It is a very wide topic. A raid drive system is always the best. It could be a 4-drive or 8-drive if possible, for personal use I believe. I don’t want to mention brand names here but it is important to do research online and try to find reliable widely used brands. If you set up a 4-bay raid you can set it up as raid 5 and one disk will be for safety and you will be using the capacity of 3 drives. Similar to an 8-bay raid if you make it raid 5 you will use the capacity of 7 drives. Or you can make it raid 6 and this time 2 drives will be for safety. A raid setup will be good for a long time of use and speed. Will be a little noisy by the way. If you have the budget you can make it with SSD drives but it will be a bit pricey. Also, you may have a 2-drive raid set up for working or a 4 TB SSD and a 4-drive raid for backup, maybe one with an ethernet connection and set it up for automatic backups and maybe use it for remote connections.