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There is no "set and forget" solution to data storage. If not cared for, data does not last.
Already pointed out by others but:
DO NOT USE NAND FLASH FOR ARCHIVAL STORAGE
Flash storage drives work by trapping tiny electric charges to represent binary data. Multi-cell NAND uses multiple levels of charges to represent more data with less individual charges, and this makes the drive more sensitive to corruption over time. Older NAND (or just any SLC drive) is better at data retention because of this.
As capacity has gone up, the tech has become gotten smaller, cheaper and more dense, it's sensitivity has gotten worse.
If you want your data to still be there in ten years DO NOT USE NAND FLASH. It relies on being powered regularly to "refresh" the charges representing the data.
Unplugged, the data will start to become corrupt within 3-5 years.
A magnetic hard drive is slightly better but most manufacturers won't promise you more than five years of guaranteed data retention when unpowered.
If you want something to be safe for ten years, an external storage device/card of any kind is not the answer (except tape drives, they are rated at 15-30 years). A live storage array with parity and hot spares, is.
If you don't want the hassle of maintaining a storage array, the next best thing is optical media, CDs, DVDs and Memory Blu-Rays are all very reliable for their rated lifetimes. Even they will eventually experience data rot, but you can expect about 25 years before that becomes a concern.
If you intend to use the SD card to essentially expand you phones storage for example, or something similar, this is ideal.
Always plugged in, is the best, and kind of only, way to use flash storage with full reliability. In this use-case, regularly powered, their only functional limit to their lifetime is how much data is written to them over time.
How to find the good ones has already been commented on. I've had a good experience with Samsung's higher end microSDs.