An external cable connects devices outside a computer or TV, helping them communicate or get power.

• Data: Connect storage drives, printers, cameras, and more using USB or similar cables for file transfer and syncing.
• Video/audio: Link laptops, tablets, and consoles to monitors, TVs, or projectors using display cables and adapters.
• Power/charging: Charge phones, tablets, and accessories with the right USB charging cable.

Choosing the right one typically comes down to matching the connector shapes on both ends and the performance you need (speed, resolution, charging wattage). On Walmart.com, you can filter by connector type, length, and features to find a fit. Checking the device manual or port labels can help minimize trial and error.

They’re designed for different jobs.

• Location: Internal cables live inside a computer case (e.g., drive and motherboard connections). External cables run outside devices to connect peripherals, displays, and accessories.
• Durability: External cables often have thicker jackets, molded connectors, and extra shielding for repeated plugging and unplugging.
• Connectors: Internal connections use standards meant for the chassis. External cables use connectors suited for ports on the device exterior.
• Use case: Internal cabling is about neat, short runs inside; external cabling focuses on reach, portability, and compatibility.

If you need to use a bare internal drive outside a PC, a purpose-built external adapter or enclosure can provide the appropriate ports and protection.

It depends on the drive’s port and enclosure.

• Portable drives: Many use a USB data/charging cable. The device end may be a Micro-B style or a newer USB-C, while the computer end is commonly USB-A or USB-C.
• Bare drives: If you’re connecting a 2.5-inch or 3.5-inch internal drive externally, a USB-to-SATA adapter can bridge the drive to your computer’s USB port.
• Power needs: 2.5-inch drives often run from USB power, while many 3.5-inch desktop drives require a separate power adapter.

Matching the connector shape on the drive and the port on your computer is the quickest way to choose. Checking specs for “SuperSpeed” USB can help if faster transfers are a priority.

Most passive video cables plug in either way, but many adapters and specialty cables are one-way.

• Look for direction labels: Packaging or listings often state “source to display,” “input/output,” or name the direction (e.g., one connector labeled source, the other labeled display).
• Connector roles: A cable or adapter that converts from one signal type to another is frequently unidirectional. If it’s labeled for a specific direction, it usually won’t work in reverse.
• Multi-display notes: Splitters or multi-stream adapters may need device support and compatible ports.

On Walmart.com, check the product description for “unidirectional” or “bidirectional” language and confirm the connector types match your device’s output and your screen’s input.

Extending USB can be helpful, but signal quality and power delivery may drop over longer runs.

• Match the spec: Use a SuperSpeed-rated extension for high-speed devices like external drives to help maintain performance.
• Keep it modest: Shorter total length generally works more reliably for data and charging.
• Consider power: For power-hungry gear (some drives, webcams), a powered USB hub or an active extension can help provide stable power and signal.
• Avoid daisy chains: Multiple chained extensions can reduce performance.

Results can vary by device and setup. Review the extension cable’s specs and customer reviews on Walmart.com, and test your setup before relying on it for critical transfers.