JKSV writes your save backups to the microSD card inside your Switch. Sooner or later you will want those archives somewhere else as well — on a PC, an external drive, or uploaded to cloud storage. That is where a good card reader and a few honest USB accessories earn their place. A slow or unreliable reader turns a two-minute copy job into a chore you keep postponing, and postponed backups are how saves get lost. This guide covers what to look for, without brand hype. If you still need the tool, you can download JKSV first.
The Reader: UHS-I Support Over a USB 3.x Connection
Two specifications decide how fast your backups move. First, the reader must support UHS-I cards at their full speed; very cheap readers sometimes cap transfer rates well below what the card can deliver. Second, the connection to your computer should be USB 3.x — sold under names such as USB 3.0, USB 3.1 Gen 1, or USB 3.2 Gen 1, all of which describe the same 5 Gbps class of link. A reader plugged into an old USB 2.0 port, or built internally as a USB 2.0 device despite a modern-looking shell, will bottleneck every copy at a fraction of UHS-I speed.
- Look for explicit UHS-I support and a USB 3.x interface in the specifications, not just the words fast or high speed in the title.
- Choose the connector your computer actually has — USB-C or USB-A — or a dual-connector model if you move between machines.
- A short, fixed cable or a direct plug-in body gives fewer failure points than long thin captive cables.
- If you also use full-size SD cards for cameras, a combo reader saves a second purchase; if not, a dedicated microSD reader is smaller and cheaper to replace.
Cables and Hubs: The Weak Links
A reader is only as good as the path behind it. Some USB-C cables sold for charging carry power well but data slowly, or not at all beyond basic rates, so keep one known data-rated cable with your backup kit and label it. Hubs deserve the same suspicion: an unpowered hub shared with several hungry devices can drop connections mid-copy, which risks corrupting the archive you are writing. For backup work, plug the reader directly into the computer where possible, or use a reputable powered hub, and never move or bump the reader while a large copy is running.
After any large transfer, verify before you delete anything: compare the folder size on the PC with the card, and open a backup archive to confirm it reads correctly. JKSV stores its output in the /JKSV/ folder at the root of the card, which makes this check a simple habit — copy the whole dated folder, confirm it, then treat the card copy as the spare rather than the only original.
Small Accessories That Prevent Big Mistakes
A protective case for spare cards sounds trivial until a loose microSD card disappears into a bag lining. A simple labeled case keeps your working card, a spare, and the reader together, which also makes a backup routine something you can do away from home. Players building a complete kit usually pair a reader with the right card from our guide to the best microSD cards for Switch save backups, and anyone keeping archives long-term should also read our comparison of the best cloud storage for JKSV WebDAV backups so one copy lives off the card entirely.
Where to Buy
The link below is an affiliate link and currently points to the retailer’s homepage while our affiliate account is being finalized. Search there for UHS-I card readers with a USB 3.x interface, and apply the checklist above rather than sorting by the boldest speed claim.
One final habit separates reliable backups from hopeful ones: eject the card properly in your operating system before removing the reader, every time. Filesystem corruption from yanking a card mid-write is a mundane, preventable failure — and it tends to be discovered at the exact moment you reach for the backup. Good accessories help, but the routine is what protects your saves.
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