Preventing Demagnetization of 2.5 HDDs Near CRT TV and DVD Drives

Is it possible to prevent the demagnetization of HDDs or is the demagnetization of HDDs an inevitable phenomenon caused by storage conditions (humidity and temperature of my room storage)?
I store the 2.5" laptop HDDs + USB3.0 enclosure inside the original cardboard boxes and inside the cabinet drawer, but next to the cabinet there is a 29" CRT TV with a speaker and in the drawer above the drawer where the HDDs are, there are 4 internal SATA DVD burner units for PCs (I think they have magnets). Will the CRT TV and DVD drive cause disturbances and damage the magnetism of these 2.5" laptop HDDs?

Humidity is not really a concern in terms of magnetism. HDDs are air-sealed so I would not expect that much humid air would enter HDD through breathing hole. Humidity can mostly affect only electronics, but overall you shouldn't store them in very damp environment.

If HDD platter are not demagnetized by huge neodymium magnets that are part of voice coil assembly, they for sure won't be demagnetized by storing them next to DVD drives, and in some distance to CRT TV.

I wouldn't recommend storing valuable data on some cheap 2.5 inch HDDs and stash them in the closet. Invest in NAS with mirrored array and then periodically back the data on external medium. The best thing you can do is to have backup in at least two different places.

And temperature room storage hdd demagnetize influencie in HDD 2.5"?

Temperature does not have impact of platter magnetism, because it is far off curie point.

In 2.5" and 3.5" HDDs stored and used once a year, the biggest cause of corruption, data loss and failures would be oxidation
if humidity and storage temperature do not affect the magnetization of HDDs?

>>21427340 In 2.5" laptop hdd and 3.5" HDDs, does demagnetization only begin above the Curie point? Usage temperature, storage temperature, humidity, age of the 2.5" HDD (example manufactured in 2010) do all of these have no influence on the demagnetization of HDDs, even in the long term?

Bit rot, what is this phenomenon? Is it related to demagnetization?

The topic is in Beginners, but let's keep some level.
Demagnetisation is not just related to the Curie point.
The biggest problem is strong magnetic fields, neodymium magnets, electromagnetic radiation, some electromagnetic pulses.
That's for sure.

Thermal effects, in particular large temperature fluctuations, can weaken the magnetic carrier over a long period of time, but this has to be carefully referred to research.

In my opinion, focus on ensuring that the disks do not lie close to any electromagnetic field sources.

If my 2.5" HDD is 20 or 30 cm away from a 29" CRT TV or if my 2.5" HDD is close to 5.25" SATA DVD Drives, will this cause any demagnetisation of the 2.5" HDD?

I had doubts about whether high temperatures (36C) and humidity (68%) would cause any demagnetization of the 2.5" HDD in the long term, and also the age of the HDD, for example, manufactured in 2010.

The electromagnetic field of a CRT TV quickly weakens and will not cause demagnetisation.
DVD drives do not generate major electromagnetic fields.
The temperature of 36C is considerable for a room, but not perceptible to the drive.
68% is a lot of humidity, but not noticeable to the drive.
I guess you live in a warm country, which one? .

2010 is already 15 years old, I guess sooner a given drive will have worn out mechanical parts than it will demagnetise.
The electronics themselves are more likely to fail, for example if you live by the ocean and then have high humidity combined with salinity.

And maybe think about additional backup?

I have 4 2.5" HDDs with the same files

Some people told me that high temperatures and humidity like mine favored the demagnetization of 2.5" HDDs and also generated bit rot. Other people told me the opposite, so I was confused

A 29" CRT TV is big and has strong magnets, but I don't know how they would demagnetize a 2.5" HDD or a 5.25" SATA DVD drive. Are there any magnets?

I will repeat that HDD platters are next to one of strongest type of magnets - neodymium magnets in voice coil assembly. This magnetic field is way stronger than anything from outside.

Bit rot will naturally occur, but it will take way longer than you think, it may be like 15-20 years until HDD error correction mechanism will start throwing an errors of unreadable sectors.

If you want to have permanent solution, try using M-Disc, or tape media. Recently I've had read over 30 year old DDT tape and it was almost fine, except broken leader that was easily fixable. But tape media is very demanding on how do you store it, especially in which humidity and temperature levels you are storing it. For HDDs just leave them as is, and stop overthinking and worrying about storing them for longer time. Just have a backup, on HDDs from different manufacturers or at least batches, and avoid media that are known to have high failure rates, like Seagate Rosewood family of 2.5 inch drives.

Your temperature and humidity will not cause the disc platters to demagnetise. Nor will a CRT television cause it.
The problem after a long time could be the mechanical components of the drive and the electronics themselves.
Electronics do not like humidity. If someone lives near the ocean with high humidity, the electronics themselves often break down.

Is it true that there is a magnet inside 2.5" HDDs?

Is this magnet stronger or weaker than the magnets in 29" CRT TVs and 5.25" SATA optical DVD drives?

If there is a magnet inside a 2.5" HDD, what protects the platters from demagnetisation?

I have M-Disc DVDs for some files, but they are small, 4.7GB. M-Disc Blu-ray + drive and LTO tapes are very expensive at the moment, so I need other media for large files, 150 to 350GB, but they are good for long-term archiving. I do not use air conditioning, so the temperature here varies from 33 to 36C and humidity 58 to 67%, but I do not have the level of demagnetization in 2.5" HDDs. These conditions will generate demagnetization in the long term.

No those conditions will not generate demagnetisation in long term. Do you even read what we are writing about?

Yes, every HDD has very strong neodymium magnets next to the platters. It's one of strongest magnets you can find. And it's only a few millimeters next to platters. That should be enough to rethink how CRT TV 30cm away will affect it.

Yes, I read everything, thank you. If 2.5" HDDs have magnets inside them, why do manufacturers and other people recommend keeping them away from magnetic sources to avoid the risk of demagnetization? Is there any PDF article or study citing information about the demagnetization of 2.5" HDDs, how does it occur in which situations, and the influence of temperature and humidity?