How do you send files from your NAS to others? Just one link with a password lets you download it. Let's calculate your uplink first
after the New Year's Day performance, the homeroom teacher asked for video footage in the group chat. The 4K video I filmed was at least 2.4G. WeChat has a file transfer limit, and after compression, the image quality becomes blurred into a mosaic; Transferring to cloud drive, sending the link to the other party still requires installing an app and logging in. The teacher is busy collecting materials for dozens of kids, leaving no time to mess around. Later, I remembered that the Feiniu NAS at home already had a link sending function. Right-click a file, generate a website link with an extraction code, and send it to the recipient's mobile browser—they could download it without installing anything. This article covers the approaches of both Feiniu and Synology, as well as several things you must understand before posting links, all in one go.
first: sending links and opening accounts for family members are two different things
each approach has its own context. She can look at her grandmother's photos of the child using her account, and she can browse them every day; Submit materials to the homeroom teacher, send a meeting video to colleagues, send a floor plan to the renovation worker, use a link, and buy and sell all at once—clean and efficient. Once you understand this boundary, you can keep reading down without confusion.
By the way, there's also a WebDAV for iPhone users, which they want to install long-term in the Files app. It's not the same as temporarily sending files. I previously wrote about connecting iOS to NAS, so I won't repeat it here.
The biggest hurdle beforelink is: outsiders have to get in
The essence of a link is a path from the public network to your NAS. Whether this road is open or fast determines whether your link is a treasure or a decoration. I've written several articles about the remote channel at home before, but here I'll just list the conclusions related to sending files:
| what your channel | link looks like | the other party's download speed |
| Synology QuickConnect (no alternatives) | gofile. Me or QuickConnect forwarding | via Synology relay , discounted during peak periods |
| Feiniu FN Connect (default) | FN Connect defaults to links | if the hole is drilled, paste it upstream; if not, go to the relay |
| public IP plus your own domain name DDNS | basically stick it to your uplink | |
| IPv6 both ends | their own domain or v6 address | same as above, and freeloading |
My mobile secondary line doesn't have a public IP address, Back then, I gave up after checking the WAN port address starting with 100.64. With this kind of relay, speed is left to fate. The main telecom broadband needs to reach public IPs, paired with DDNS, linking to your own domain for stable speed. Whether you need to use a public IP address, how to ask the carrier for , I wrote a detailed article before. Here's just one reminder: before sending a link, first identify the fastest channel at home. Otherwise, sending the link and the recipient will click and spin the circle, which is even more awkward than WeChat not being able to get it.
both companies' switches are in the right-click: Feiniu calls it external link sharing, Synology calls it shared links
Feiniu's external link sharing was added in version 0.8.26, and the system has long passed this version, so it is available directly. Open File Manager, find the file or folder you want to send, right-click, select Create Share Link, and two things will pop up: one extraction code and one expiration date. For extraction codes, it's recommended to start at four digits, and the validity period depends on the situation. I set the material for the teacher for three days, and once submitted, it expires, so the link doesn't stay alive.
there's another global settings area worth checking for administrators: System Settings, Remote Access, External Link Sharing. On this page, you can change the domain used for sharing links, and there's a very thoughtful option I find — speed limit. Why speed limits? Because your home upload link is only that wide, if the other party runs multiple threads and pulls hard, a single link can wipe out the entire uplink in the family, and everyone else in the family will scroll through videos. Limit backlinks to two or three MB per second, and the recipient can still download them easily, and your home network won't suffer. This approach is similar to router speed limiting, except this time it limits links you send yourself. Once
link is sent, it's not just water spilled out. In File Management, go to the External Link Sharing section—list all links you've posted, when they expired, and manually close after finishing tasks—it's more reassuring than waiting for them to expire.
Synology says differently; the functions are the same. Open File Station, right-click the file you want to send, select Share, and in the pop-up window, you can copy the link, send an email, or generate a QR code. The QR code format is quite suitable for handing it to someone face-to-face: a friend sits across from you, a quick scan with your phone and the file is taken away, and you don't even need to link it through WeChat.
Don't skip the safety section. Check the box to enable secure sharing, where you can set a password and set the link's expiration date. My habit is to set both the password and expiration date, send another message on WeChat with the password, and don't put the link in the same sentence—link to one message and password for one message, and at least half the risk of being casually forwarded. I also reminded my cousin about his Synology system: File Station has a sharing link tab, so you can see how many links each person has created and the maximum limit. If multiple people at home use it, check them out every so you don't have links sent two years ago still hanging on the public network.
there's another detail that's easy to fool: the link looks like depends on how you usually log into DSM. If you log in with QuickConnect, the generated link is gofile.me the same string; If you use DDNS, link to your own domain, and the speed difference is as mentioned in the previous table. Also, the number of links is limited, not unlimited. If you have dozens of links on an old machine, just delete expired ones in the settings.
speed is a matter to be calculated before posting
this is the easiest part to take for granted in the whole matter. Many people think that sending a 2.4GB file on their gigabit broadband takes no more than a few seconds—that's the download speed, and when the other party pulls your files, it goes to your home for upstream. the uplink and downlink are unequal. My Gigabit packet only allows 50MB uplink, which means a maximum of 6MB per second. Ideally, 2.4G video would take nearly seven minutes for the other party. If they use the relay channel, this number will have to be cut even further.
before sending a link, you should mentally repeat the numbers: file size, upload speed, and how long the other party will wait. A few gigabytes of video or photo, sending a link is perfectly suitable; the other party waits a few minutes without a problem; If it's a material package of tens of gigabytes, like the original file you need to submit for editing, even if you provide 100MB upstream, the other party will still take about an hour. For this, I'd rather copy it to an external hard drive and send it via SF Express, which arrives the next day without taking up broadband at home. NAS can send links is a skill, but files of no particular size should follow this path.
conversely, this account is also an opportunity to test the channel. Before posting, use your phone's data to click through the link. If the download speed doesn't even reach 1MB per second, it's probably a relay route. Instead of letting your partner wait, it's better to clear up your home channels. Public IPs, IPv6, frp relays each has its own suitable audience. I've written about them before, so let's dig them out and work together.
three safety bottom lines, don't skip any of them. Sending
link is like opening a locked window on your NAS. The windows must be opened and locked sufficiently.
first rule, you must have a password. A link without a password can be downloaded by whoever finds it, and it might be forwarded out of the WeChat group for eight hands—you can't control it. Article 2: The validity period must be set. Things have deadlines: submit materials in three days, download an installation package for a friend for one day, and the link will automatically crash after finishing, which is much more reliable than just remembering to turn it off. Third, only share one file; don't try to save the whole folder. Once you share a folder, everything inside is in the window, including old files you forgot to delete. This is the same as lending a portable hard drive—only borrow the one they want.
if someone wants to take things from you all the time, like a studio delivering to clients, then don't use backlinks. Open a dedicated low-access account, or simply a tab VPN let them come in and pick it up. Permissions and logs are clear, and there are traces to follow. Backlinks are positioned as one-time transactions; don't let them become permanent channels.
which files you link to, take them as they are
| what you want to post | which path |
| several gigabytes of video and photos to share with others | backlink, password, and shorter validity period |
| to show family photos long-term | open read-only accounts to install apps, avoid external links |
| speeds up transfers of raw materials on external hard drives, don't make it hard to upload upwards | |
| small documents, within hundreds of megabytes | can be sent directly via WeChat, no need to NAS |
| sensitive things, ledgers, or contracts | Don't use external links; the VPN |
yourself is simple: first check the file size, then who you send it to and how many times you use it. A few gigs, outsiders, once or twice—links are the smoothest; If any one of these three conditions is not met, they must change their path. After posting, go back to the backlink list and close the link. Don't be lazy at this step—the window should close once you're done.
