For a one-time handoff, use a protected, time-limited Send link. For ongoing work, use Add people on a dedicated folder and grant only the permissions each person needs. For incoming submissions, use Receive files. Then review and remove access when the task is over. Koofr’s sharing controls help limit access, but a public link can still be forwarded, and revoking it cannot erase copies already downloaded.
Choose the right Koofr sharing method
Koofr offers three distinct ways to share, depending on what the recipient needs to do. Its file and folder sharing help describes the access requirements and boundaries for each.
| Method | Recipient access | Best for | Important boundary |
|---|---|---|---|
| Add people | Account-based; recipients need a Koofr account. | Ongoing access or collaboration. | A file shared directly is read-only. Folder permissions can allow collaboration and apply to the whole folder. |
| Send link | Recipients can access without a Koofr account. | A one-way download handoff. | Read-only access. The link can be password-protected and given an expiry. |
| Receive files | Uploaders can use the link without a Koofr account. | Collecting files into a chosen folder. | Creates an upload link; protect and expire it as appropriate. |
Send a protected download link
Use Send link when someone needs to download a file or folder but does not need to edit it. Treat the link as a bearer credential: anyone who obtains it may be able to use it, so password protection does not prove who the recipient is or prevent forwarding.
- Select the file or folder in Koofr and choose Send link.
- In the sharing dialog, enable Protect link with password and set a password if that option is available. Koofr says custom passwords are 6 to 16 characters and may contain letters and numbers; choosing a custom password is limited to paid accounts. Koofr also says some potentially malicious file types require password protection, and free accounts cannot publicly share executables and certain other commonly malicious files. Check the options available in your account.
- Set an expiry that gives the recipient enough time to retrieve the files. Koofr lists one hour, one day, one week, never, and a custom date. Free accounts cannot create links with no time limit. A short, task-matched expiry is safer than leaving a link open indefinitely.
- Send the link only to the intended recipient. Where practical, send its password through a separate channel; do not post either in a public place or a group with a wider audience.
For current password and expiry details, see Koofr’s help on password-protecting links and setting a link expiry date.
#1 Best Overall
- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
- Aluminum Alloy Housing: Built with a sturdy aluminum alloy shell that aids in heat dissipation and protects against daily wear and scratches. Designed to maintain a stable and secure connection.
- Compact & Travel-Friendly: The ultra-compact design allows the adapter to stay plugged into your device without blocking adjacent ports or adding bulk, reducing wear and tear on your original USB ports.
- 12-Month Warranty: Backed by a 12-month manufacturer warranty for peace of mind. Designed to meet strict quality control standards for reliable everyday performance.
Share a folder for collaboration
Choose Add people when collaborators need continuing account-based access. Sharing a file directly this way is read-only; to let someone edit, put the file in a folder and share that folder. Because folder permissions cover the entire shared folder, create a dedicated folder if collaborators should not see or change other files.
Review permissions for each person. Koofr’s shared-folder permission guide lists controls for commenting and labeling, modifying files, creating download or upload links, and managing the share. Modification can include adding, deleting, moving, copying, renaming, and downloading files and folders. Give each person only the rights needed for the task.
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
- Quick Data Transfers: Accelerate your productivity with rapid data transfers using a high-speed 5Gbps USB 3.0 port and two 480Mbps USB 2.0 ports.
- 4K HDMI Display: Enhance your visual experience with a hub capable of delivering 4K resolution at 30Hz in both mirror and extend modes. Please note that this hub is compatible with MacBook (macOS 12 and newer), Windows 10 and 11, ChromeOS, and laptops equipped with DP Alt Mode and Power Delivery. Note: This device is not compatible with Linux.
- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
Collect files with a Receive files link
Use Receive files to let people upload items into a chosen folder without giving them ordinary collaborator access. Create the upload link for the intended folder, then protect it with a password or expiry if those controls are available for the link. Share it only with the people submitting files. Anyone with the link may be able to upload, so remove it when submissions are no longer needed.
Review and revoke links or collaborator access
Koofr’s Links area lets you inspect public upload and download links, edit or remove them, and see activity counts: how many times a download link was opened or how many files arrived through an upload link. Links are grouped by whether they expire within 48 hours, within two weeks, in more than two weeks, or never. Those counts indicate activity; they do not establish the identity of the person who accessed a link. See Koofr’s link-management instructions.
Rank #3
- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
- Flawless 4K@60Hz Video with HDMI: Delivers exceptional clarity and smoothness with its 4K@60Hz HDMI port, making it ideal for high-definition presentations and entertainment. (Note: Only the HDMI port supports video projection; the USB-C port is for data transfer only.)
- Double Up on Efficiency: The two USB-A 3.0 ports and a USB-C port support a fast 5Gbps data rate, significantly boosting your transfer speeds and improving productivity.
- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
When a handoff or collaboration ends, remove the relevant link, share, or person. Koofr explains how to remove a share and remove a link. Removing a link stops future access through that link; it does not delete files a recipient already downloaded.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What Koofr says about encryption—and what Vault changes
Koofr states that transfers use SSL/TLS and that files are encrypted server-side after they reach its servers. These are Koofr’s descriptions of its service, not an independent security assessment; see its file protection explanation.
Rank #4
- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
- Upgraded Exquisite Craftsmanship: With an aluminum alloy housing and metal connector, the usbc to usb adapter is extremely durable and sturdy. Rigorously tested to withstand more than 10,000 times of plugging and unplugging, ensuring long-lasting performance
- Broad Compatible: The usb c to usb adapter widely supports all USB C/ USB A devices like laptops, tablets, cellphones, car chargers, and phone chargers. Such as compatible with MacBook Pro/Air 2023/2022, Thunderbolt 4/3 Devices,Apple MagSafe Watch 9/8/7/SE/Ultra, iPad Pro 2022/2021, Samsung Galaxy S23/S20/S10, and iPhone 17/16/15 Pro. Plug and play
- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
Koofr Vault is a separate client-side encryption feature. Koofr says Vault encrypts filenames and file contents locally before upload, and that the Safe Key is not sent to Koofr. The Vault overview and Safe Key explanation describe that design. The reviewed Koofr help does not establish whether Vault items can be shared through the ordinary Send link flow. Check current official Vault instructions before relying on a public-link workflow for Vault files.
Quick Recap
Best Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
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