Storage is cheap. Backup is easy (if you trust the cloud).
Keep as many TB local storage as you need (a non pro should probably be fine with a few TB for stills of you cull the imports of near-duplicates and OOF shots etc). Spinning disks cost next to nothing and are good enough.
Then, if you want, use one or more means of local protection, such as mirrored local disks or sync to a NAS, preferably at a remote location to protect against theft and fire but local is ok if you must. If you trust your backup service and you have a very good internet connection you could skip this step and just use a few TB of local storage.
Last and most importantly: have a proper backup. syncing to a copy isn't backup. A backup from which you can restore any file from history, after you corrupt it or accidentally delete it (you will do this, and it will happen many more times than you suffer from a disk malfunction or burglary). Even your own carefully crafted backup solution will fail. So plan for that too (by using a 3rd party service too).
There are several very cheap providers of unlimited backup of this kind, for example CrashPlan. Regardless of whether I used proper backup to a remote storage, I'd still make sure to also backup to a cloud service, or even backup both the PC and the NAS to the same service (at no extra cost if it's an unlimited service such as the CrashPlan 10 computer family plan).
Keep as many TB local storage as you need (a non pro should probably be fine with a few TB for stills of you cull the imports of near-duplicates and OOF shots etc). Spinning disks cost next to nothing and are good enough.
Then, if you want, use one or more means of local protection, such as mirrored local disks or sync to a NAS, preferably at a remote location to protect against theft and fire but local is ok if you must. If you trust your backup service and you have a very good internet connection you could skip this step and just use a few TB of local storage.
Last and most importantly: have a proper backup. syncing to a copy isn't backup. A backup from which you can restore any file from history, after you corrupt it or accidentally delete it (you will do this, and it will happen many more times than you suffer from a disk malfunction or burglary). Even your own carefully crafted backup solution will fail. So plan for that too (by using a 3rd party service too).
There are several very cheap providers of unlimited backup of this kind, for example CrashPlan. Regardless of whether I used proper backup to a remote storage, I'd still make sure to also backup to a cloud service, or even backup both the PC and the NAS to the same service (at no extra cost if it's an unlimited service such as the CrashPlan 10 computer family plan).