I would suggest that anything you seriously do not want to found by anyone else other than yourself, should be kept in a different physical location - ideally hidden not even on your own property.
If you really must have regular access to these files, invest in a large SD card - at least 64GB or even 128GB - and create an encrypted folder within another encrypted folder on the card; and then keep this very well and truly hidden physically.
You should probably read about good hiding places other people use as much as you can, and then hide the object anywhere other than places you have already read about, using your own ingenuity. Don't keep this card physically hidden in arms reach, or even in the same room, of a computer.
This card, ideally, should never be found - it is your ultimate line of defense.
However if this card is found, the card should contain files which you could plausibly argue justify the hiding of the card. If there is just regular files on the card, this does nothing but arouse suspicions even further - why would one go to the effort of hiding a card with regular files on it?
If you put circumspect, but not incriminating files, on the card, you can justify hiding it. However, you must also assume that any would-be investigator will assume there is encrypted files on it.
If you are asked at anytime, to reveal any encryption keys to the files, you may be breaking local laws simply but not revealing them. It's in your best interest to announce that you have encrypted files and to reveal the encryption key to your decoy folder - show them that you have nothing to hide, nor have you committed any crime.
At every step of the way, be as compliant as possible, don't give them any reason to think you have anything incriminating to hide. If you act coy and unhelpful, they are going to search very thoroughly indeed, and they
will crack your encryption. Remain calm, show you want to help - do their job for them.
The first encrypted folder should contain decoy files, this could be anything you would plausibly want to keep secret and encrypted. Again, use your own ingenuity - and do not use pornography as your decoy.
The second encrypted folder should contain the information that you are truly hiding.
Do not use the same encryption key for both encrypted files. These keys should be very long and use a mix of lowercase letters, uppercase letters, numbers and symbols. Do not use "randomly generated password makers" online - come up with your own and create a mnemonic for yourself to remember them.
For example:
OuattwaymnG.HbadcfAf$9. = Once upon a time there was a young man named George. He bought a domestic cat from Africa for $9.
That's 23 characters. Come up with three sentences like this. They are easy to remember, and only use capitals on the pro-nouns and it will be easy to remember which letters are capitals.
I'm afraid with the sort of technology that exists these days, hiding files within a few layers of windows folders on the computer doesn't cut it anymore.
I am a piece of knowledge-retaining computer code imitating an imaginary organic being.