SD Cards Re-evaluated in the Era of Cloud Dominance: The Argument for the "Ultimate Physical Media" in Fingertip Size

When people hear "physical media," many think of CDs, DVDs, Blu-rays, records, cassette tapes, or game cartridges. All of these have a tangible form and can be placed on one's shelf. Unlike streaming services, there is less worry about suddenly losing access due to contract termination or service discontinuation.

However, there are physical media candidates that are rarely discussed: SD cards and microSD cards.

Generally, they are perceived as storage for cameras, capacity expansion for smartphones, or storage for portable gaming consoles. But they can store more than just photos. Music, movies, TV shows, e-books, documents, games, maps, educational materials—any content that can be made into a file can be widely carried.

An article from Pocket-lint cites four reasons why SD cards are considered the "ultimate physical media": compactness, durability, recording density, and convenience. Indeed, SD cards satisfy the desire to "keep works in one's possession" in a form different from traditional discs or tapes.

Physical media that require no shelves

A standard-sized SD card measures 32×24×2.1 mm, and a microSD card is 15×11×1 mm. A microSD card is about the size of a fingernail and can be stored in thin dedicated cases.

While a single CD or Blu-ray is thin, collecting dozens or hundreds requires shelves or storage boxes. Including cases and jackets, the collection takes up more space than expected. During a move, they become heavy luggage, and managing them to prevent scratches or breaks is essential.

On the other hand, with microSD cards, even if you separate them for movies, music, e-books, and games, they fit into a small case. Depending on the capacity, you can carry a large number of works on a single card.

This compactness holds great value for people living in urban housing or studio apartments, those who travel frequently for business or leisure, or those who want offline playback in cars or planes. Despite being physical media, they do not require storage furniture.

However, their small size is also their biggest weakness. Especially with microSD cards, it's easy to overlook if dropped and they can easily slip into pockets or bags. If you own many, it's better to prepare numbered cases or management sheets. Reducing shelves does not eliminate the need for management.

Storage density far exceeds optical discs

SD cards have capacity-based standards. SD covers up to 2GB, SDHC covers over 2GB up to 32GB, SDXC covers over 32GB up to 2TB, and SDUC covers over 2TB up to a maximum of 128TB.

Of course, this doesn't mean a 128TB card is available at a typical price in stores. This is the upper limit of the standard, and the actual purchasable capacity, price, and compatible devices are separate issues. Still, the current technology that allows terabyte-level data to be stored on a card the size of a fingertip is remarkable as physical media.

The required capacity varies greatly depending on video quality and compression methods, but with a 1TB card, you can carry numerous movies and dramas, a vast amount of music, e-books, and photos together. Instead of swapping dozens of discs, you can select and play the desired work from a folder.

This feature is akin to carrying your own personal streaming service. You can access saved works immediately without connecting to the internet. There's no need to worry about data usage or signal conditions, and you're not affected by service-side issues.

More durable than they appear, but not "permanent storage"

SD cards are thin and have exposed terminals, making them seem fragile. However, products from reliable manufacturers boast features like waterproofing, temperature resistance, X-ray resistance, magnetic resistance, drop resistance, and wear resistance.

Without rotating parts like HDDs or large exposed recording surfaces like optical discs, if stored in a dedicated case and handled properly, they offer sufficient durability as portable media.

However, it's important to note that being resistant to external water or shocks does not equate to data being reliably preserved for decades.

The flash memory used in SD cards has a rewrite lifespan, and there's a possibility of controller failure or file system corruption. Especially for uses that involve repeated writing, like surveillance cameras or dashcams, the load is significant. In such cases, it's necessary to choose high-durability models.

For libraries of movies, music, and e-books where data is written once and mainly read, the load is relatively small. Still, one should not think "it's safe forever because it's on an SD card."

Plug-and-play usability across various devices

The convenience of SD cards is supported by the wide range of compatible devices.

Not only cameras and computers, but also portable gaming consoles, music players, e-book readers, tablets, video devices, and single-board computers use them. Even devices without card slots can sometimes read and write using USB-C compatible card readers.

Unlike cartridges that can only be used with specific game consoles, general files on an SD card can be opened on multiple devices as long as the app and format are compatible. It's easy to organize videos on a computer, play them on a tablet, and listen to music on a different player.

However, not all cards can be used on all devices. Supported capacities, file systems, and speed standards vary by device. Older devices may not recognize high-capacity SDXC or SDUC cards. Before purchasing, it's important to check the device's manual or manufacturer information.

Additionally, works downloaded from video streaming services may not be freely copied to SD cards. Due to DRM, they may only be playable within the app or have usage time limits. SD cards function as free physical media mainly for data you have shot or created yourself, or files that have been legitimately obtained and allowed to be saved.

On social media, "too convenient" and "don't trust too much" are discussed simultaneously

In the comments section of the original Pocket-lint article, there were almost no direct reader posts at the time of publication. Therefore, looking at public discussions on platforms like Reddit about the use and reliability of SD cards, user reactions are largely divided into two.

Prominent positive feedback highlights the capacity expansion of portable gaming consoles. In discussions related to the Steam Deck, there's an opinion that combining a cheaper base unit with a microSD card offers better cost-effectiveness than purchasing an expensive high-capacity model. The ability to carry multiple games and switch libraries by card is also appreciated.

Conversely, some prefer to choose high-capacity models despite the price difference because built-in storage is faster and there's no hassle of selecting or managing cards separately. While SD cards can cheaply increase capacity, they are not optimal for everyone.

In communities that emphasize data preservation, there are anecdotes of reading photos and music from over a decade ago from old SD cards, with some enjoying cards as "digital time capsules." Finding old low-bitrate audio or old videos and recalling memories from that time demonstrates the emotional value typical of physical media.

On the other hand, there are reports of cards suddenly not being recognized, files being corrupted, and differing results even with the same brand. Many suspect counterfeit cards that are hard to distinguish from genuine ones. Even if a well-known brand name is displayed, extremely cheap products from unknown sellers may not be safe.

In recent smartphone-related discussions, while there are voices hoping for the return of microSD slots, there are also complaints about the difficulty of repairing files without a computer if they get corrupted during travel. The ability to remove them leads to freedom, but users must handle troubleshooting themselves.

Summarizing social media reactions, few deny the convenience of SD cards themselves. The issue is "how much to trust them." Even those who highly value them as convenient portable libraries are cautious about using them as the sole storage location.

Is an SD card truly "physical media"?

There may be disagreements about calling SD cards the ultimate physical media.

Blu-rays, records, and game cartridges are sold as an integrated product with the work. There is the enjoyment of looking at jackets, discs, and manuals, and they can sometimes be bought and sold as used items. Ownership is easily visible from the outside, and the shelf itself becomes a collection.

An empty SD card does not have such inherent value tied to a work. What files to save, how to categorize them, and on which devices to play them are left to the user.

In other words, an SD card is not a physical media as a commercially finished product but a physical media that you edit yourself.

You can create cards with themes like "1980s Movies," "Travel Anime," "Work Music," or "Emergency Maps and Materials," and rearrange the contents yourself. While the joy of collecting packages is limited, there is the freedom to design a library according to your life and purposes.

This is better thought of as a new form of ownership that lies between physical media and digital files rather than a substitute for optical discs.

The biggest weakness is forgetting backups because it's too convenient

SD cards are small, easy to handle, and have large capacities. Therefore, one might be tempted to consolidate important data onto a single card. However, saving everything on just one card can lead to total data loss if it is lost or fails.

Important photos, documents, and creations should be copied elsewhere besides the SD card. For example, you can use an SD card for portability, an external SSD or HDD at home, and cloud storage in a different location to diversify media and storage locations.

In the world of backups, the "3-2-1" strategy is known, which involves preparing three copies of data, saving them on two different media, and placing one in a separate location. Using an SD card as part of this strategy is effective, but it should not be the sole solution.

Additionally, regularly check and read stored cards, and if necessary, copy them to new media. Keeping a list of purchase dates, uses, capacities, and backup locations makes it easier to manage even as the number of cards increases.

Conclusion—SD cards are not "permanent storage" but "portable shelves"

SD cards are not a universal storage device that surpasses other media in every aspect.

For long-term storage assurance and collectability, optical discs may excel. SSDs are suitable for fast editing tasks, and HDDs may be advantageous for storing large amounts of data at low cost. SD cards are small enough to be easily lost, and attention is needed for counterfeit products and sudden failures.

Nevertheless, considering capacity, portability, power consumption, the number of compatible devices, and the flexibility to freely swap contents, SD cards are undoubtedly highly accomplished physical media.

Streaming services are like borrowing access rights from a giant library. Cloud storage is a safe deposit box used over a network. In contrast, an SD card is a small bookshelf that you can fill with your chosen works and carry in your pocket.

Whether it is the ultimate physical media depends on what you prioritize. If you seek packages, jackets, and a sense of ownership, records and Blu-rays will continue to hold a special place.

However, if you prioritize being able to use it without communication, manage it yourself, swap it across a wide range of devices, and not needing shelves, few media are as rational as SD cards.

However, there is one condition to maximize its value: do not trust SD cards too much and always leave a copy elsewhere. SD cards shine the most when used not as the "final storage location" but as a "personal library that can be freely carried."

[Source URL]

Pocket-lint "4 reasons why SD cards are the ultimate form of physical media": Discusses the compactness, durability, capacity, and connectivity of SD cards from the perspective of physical media.
https://www.pocket-lint.com/reasons-why-sd-cards-are-the-ultimate-form-of-physical-media/

SD Association "Capacity (SD/SDHC/SDXC/SDUC)": Referenced to confirm the range of each capacity standard, file systems, and official dimensions of SD and microSD cards.
https://www.sdcard.org/ja/developers-2/sd-standard-overview/capacity-sd-sdhc-sdxc-sduc/

SD Association "SD, SDHC, SDXC, and SDUC card capacity choices": Referenced for compatibility of cards and host devices and the need to confirm supported standards.
https://www.sdcard.org/ja/consumers-2/about-sd-memory-card-choices/sd-sdhc-sdxc-and-sduc-card-capacity-choices/

Samsung "EVO Plus microSD Card": Referenced as an example of the protective performance of manufacturer-made cards, including waterproofing, temperature resistance, X-ray resistance, magnetic resistance, drop resistance, and wear resistance.
https://www.samsung.com/uk/memory-storage/memory-card/evo-plus-64gb-microsd-card-mb-mc64ka-eu/

Reddit "Found these when going through THE drawer!": Referenced for reactions treating cards as time capsules and experiences of reading photos and music from old SD cards.
https://www.reddit.com/r/DataHoarder/comments/1ryrqqs/found_these_when_going_through_the_drawer/

Reddit "What brand of microSD are Thor players using?": Referenced for user opinions on card failures, suspicions of counterfeit products, the importance of purchasing from legitimate sellers, and durability.
https://www.reddit.com/r/AynThor/comments/1qfjitq/what_brand_of_microsd_are_thor_players_using/

Reddit "To people who ordered the 512 gigabyte Steam Deck. Is it worth it?": Referenced for discussions on the idea of adding capacity with a microSD card to keep the main unit price down and the convenience of choosing a built-in high-capacity model.
https://www.reddit.com/r/SteamDeck/comments/zwh5cj/to_people_who_ordered_the_512_gigabyte_steam_deck/

Reddit "Global smartphones priced below $400 will decline by 22% as memory costs soar": Referenced for opinions hoping for the return of microSD slots and pointing out the difficulty of handling file corruption.
https://www.reddit.com/r/Android/comments/1uq96ti/global_smartphones_priced_below_400_will_decline/