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Nope. I just didn't mention it. Before I got double SSDs and double DAS, I already had a remote NAS, cloud, a laptop, various external drives and storage on my phone and tablet. It started with the laptop, when it was new. I installed a NVMe SSD and a SATA SSD in the laptop and setup automatic backup of the NVMe SSD to the SATA SSD. And that worked so well that I then I did the same with my PC. At one point I had two NAS. One Synology and one DIY RPi4 based with a RAID enclosure. I reused the drives in the 4 bay RPi4 based NAS for a DAS. Worked so well that I got a second DAS. Still have the Synology NAS, but at a remote location.

Would be worse.

You already have backup software installed. Just use it.

Possibly with an external drive. An external multibay DAS will give room for growth and reduce cable clutter.

What I did was to install two SSDs in my PC. One is only used for backups of the other, every boot. (Hardlinked rsync snapshots.)

In addition I got two multibay usb DAS. I use one DAS for media storage and backups of the PC, and one DAS for backups of the other.

Seeding will wear out any HDD quickly. Use a SSD instead.

Sequential access is where HDDs shine.

Random access is where SSDs shine.

I am very pleased with my IB-3805-C31. A 5 bay USB (10Gbps) JBOD enclosure.

You access the drives as separate drives and can turn them on/off individually.

I use it with Linux and mergerfs and snapraid. Works very well. Silent and robust. Sabrent has an identical(?) enclosure.

Will also help with noise. When spun down the drive is silent.

It is likely that the files will be fine for years. But they may become corrupt tomorrow.

You need multiple copies, on different types of media. And check/migrate regularly.

After x months the standard SD card will fail. After y months the endurance SD card will fail. It is likely that y is a larger number than x.

Video will then no longer be recorded and the camera will, perhaps, behave as if no SD card is inserted. Or it will explode in a small thermonuclear detonation. YMMV.

It depends on what USB stick and what SD card.

A high quality "Extreme Endurance" SD card can be expected to last much longer than a random USB stick.

A decent quality SSD, in a USB stick shape, might be even better.

I like SanDisk Extreme Pro Solid State USB sticks. Somewhere in between. Perhaps.

I have two internal SSDs in both my PC and in my Laptop.

One SSD is used for OS and files as normal. The other is used for automatic versioned backups of user files (not the OS) on the first SSD, every time I boot.

I also have two multibay USB DAS. Mergerfs and snapraid. One DAS is used mainly for media file storage and for backups of important folders on my PC and Laptop, as well as backups of my phone (mostly photos) and tablet. The other DAS is used mainly for backups of the other DAS.

Consider upgrading the SSD in your laptop.

I use the famous rsync command line utility to sync folders between different filesystem. It is available for all major operating systems. Or you can use some alternative more easy to use GUI utility with similar or better functionality. Or you could use incremental/differential backups using almost any backup software, including the software you already have installed, by default, on your computer.

https://alternativeto.net/software/rsync/

You will need to invest some time and effort to learn and experiment with various backup software. Perhaps what you already have installed is enough? Perhaps you need to buy and/or install something more?

How I do this:

I use Linux and rsync. I wrote a script to create snapshot style rsync backups with hardlinks. Very similar to rsnapshot, but much simpler.

Using the script I can efficiently create what looks like timestamped full backup copies of the original files. But each copy actually only stores new or modified files since the previous backup. And hardlink in "fake" copies of unchanged files from the previous backup. This is a form of incremental backup masquerading as a full backup. Very easy to restore from. Just copy as if it is a normal copy. Since only new/modified files are stored, a backup is usually very fast and takes up very little storage. So I can afford to store many timestamped backups of my files.

My script also delete old backups so, for example, at most only 7 daily, 4 weekly and 4 monthly backup copies are retained.

I have two 4TB SSDs in my PC. The primary SSD is used to store the OS and user files as normal. The secondary SSD is used to store versioned snapshot copies of all the user files stored on the primary SSD. The OS and the download folder is excluded.

Every time I boot my PC, automatically a new backup snapshot copy is created of all my user files.

In addition I have two external multibay USB DAS. I manually trigger similar backup of specific folders on the primary SSD to the primary DAS, using the same script.

In addition I backup the primary DAS to the secondary DAS the same way.

In addition, I also store my most important files on my laptop, phone and on my tablet, as well as on a remote DAS. Currently about 300MB. I have a 512MB SD card in my tablet and a 1TB SD card in my phone.

The laptop also have two SSDs setup like my PC, but it is 2TB NVMe and 4TB SATA SSD.

In addition, copies of stuff like old scanned family photos are distributed to relatives.

For some less important files, like downloaded media, I may only keep a single backup copy. And only if I have bothered to normalize metadata and copy it to my media archive on my primary DAS.

For some more important files, like written documets, source code or financial documents, I store more than 3 copies. I also have copies on my phone and tablet and on remote storage.

I use another sync tool to copy prepared folders from the primary DAS to my android phone/tablet, FolderSync Pro. Also some media like selected downloaded ebooks and audiobooks.