I don't think anyone has long term experience with qlc storage. It isn't old enough for that.
Manufacturers have most likely simulated accelerated aging using heat, and set their warranty accordingly.
Don't expect more than what the warranty promise.
There is no consumer long term digital storage solution. Except multiple copies and continuous migration to new media.
No, but I asked the owners of the website and they say that you should not give up but keep trying and also reload the page and perhaps click on some of the ads.
I do both.
I have two SSD in both my PC and my laptop. And two DAS connected to the PC and shared over wifi. One of the DAS hold my large media and backups. The other DAS is mostly used for backups.
Every time I boot my PC, or laptop, a new rsync snapshot of the full /home on the primary SSD is automatically created on the secondary SSD.
I also manually create rsync snapshots of folders on the PC/laptop primary on the primary DAS and also of folders on the primary DAS to the secondary DAS. By manually I mean automatically, but only after I trigger it by double click on a script on the desktop.
3-2-1 is a suggested default backup strategy.
3 backup copies. 2 different types of media. 1 copy stored remotely.
I use a mix of backup strategies. 8-3-3 to 1-1-0, depending on what it is I backup. For example, I have two internal SSDs on my PC. Every boot a new updated versioned rsync snapshot of the primary SSD is automatically created on the secondary SSD. Only new and modified files are actually copied. Files present in the previous snapshot are simply hardlinked. So each snapshot looks like a full copy, but takes up very little storage and is very fast to make.
In addition I have two large DAS, a small NAS, a small cloud account and various external drives and devices, some stored with relatives. They are also used for backups.
I use internal SSDs in external USB enclosures. Typically after upgrading internal SSDs.
For example I have 2TB and 4TB Crucial MX500 SATA drives and 2TB Samsung EVO 970 Plus NVMe drives in external USB enclosures.
Answer to the question in the title: No.
I strongly advice against that DAS. I have an identical(?) 10 bay ICY BOX DAS. IB-3810U3.
It works perfectly fine, but is flimsy and noisy.
On the other hand, the 5 bay enclosure, IB-3805-C31, is great! Solid, robust and silent. Especially compared to the 10 bay enclosure. I assume the 5 bay Sabrent enclosure is the same.
I can have the 5 bay enclosure turned on, with idle Exos drives, in the bedroom and sleep fine. Not so with the 10 bay enclosure.
Check for Uncorrectable sector count. As long as that is zero, your reallocated sectors were reallocated without any dataloss.
Modern hdds are designed to reallocate sectors in order to "self-heal" during the warranty period. So reallocated sectors may not spell immediate disaster. Just normal and expected behavior.
If you think the hdd is going bad, avoid writing to it. Only read and rescue your data ASAP.
No. I don't think you should use USB Flash at all, except as part of daily use. For long term storage, up to a year, use a proper SSDs and/or HDDs. And check and migrate.
I organize my digital photos by date and time. I rename them using the embedded timestamp. There are various tools that can quickly rename all your photos with a timestamp as prefix. ExifTool, for example.
Once the photos are renamed with a timestamp prefixed, it is very easy to group and organize them. One folder per year. Subfolders per month or for special events. Add name of the event, persons and places to the filenames or subfolders.
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.