100 GB is the point where "just use WeTransfer" stops working. A full video shoot, a game build, a disk image or a year of RAW photos easily reaches it — and almost every free service caps you long before. This guide shows how to send a 100 GB file for free, what it really costs in time, and how to set things up so a transfer that runs for hours actually finishes.
Which free services can send a 100 GB file?
As of 5 November 2026, from each vendor's own help pages:
| Service | Free limit | 100 GB possible free? | Files stored? | Sender online? |
|---|---|---|---|---|
| Email (Gmail, Outlook.com) | 20–25 MB | No | Yes | No |
| WeTransfer (free) | 3 GB per transfer, 10 transfers or 3 GB per 30 days | No | Yes, 3 days | No |
| Dropbox Transfer (Basic) | 2 GB | No | Yes, 7 days | No |
| iCloud Mail Drop | 5 GB | No | Yes, 30 days | No |
| Google Drive (free) | 15 GB storage | No | Yes | No |
| SwissTransfer | 50 GB per transfer | Only split into 2+ parts | Yes, up to 30 days | No |
| StrongFolder (P2P) | None set by the service | Yes | No | Yes |
| External drive by post | Size of the drive | Yes (cost of drive + postage) | — | — |
The honest summary: for a single 100 GB file there are two free routes — split it for a big free transfer service, or send it directly. Paid plans of cloud drives and transfer services handle 100 GB too; check their current pricing if you send this much every week.
How long does it take to send 100 GB?
Your upload speed decides everything. The formula: size in GB × 8,000 ÷ upload in Mbit/s = seconds. For 100 GB that is 800,000 ÷ Mbit/s:
| Upload speed | Time for 100 GB | Typical connection |
|---|---|---|
| 5 Mbit/s | ~44 h | Slow DSL, weak mobile signal |
| 10 Mbit/s | ~22 h | DSL, basic cable |
| 20 Mbit/s | ~11 h | Cable |
| 50 Mbit/s | ~4.4 h | Good cable, entry fibre |
| 100 Mbit/s | ~2.2 h | Fibre |
| 500 Mbit/s | ~27 min | Fast fibre |
| 1,000 Mbit/s | ~13 min | Gigabit fibre (both ends) |
Real transfers add 5–15 % for protocol overhead and are capped by the slower of the two connections — the sender's upload or the recipient's download.
With a cloud or transfer service you pay twice in sequence: first your upload, then the recipient's download. With a direct transfer both happen at the same time, so the recipient has the file when your upload ends.
How do I find my upload speed?
Run any speed test in your browser and look at the upload figure, not the download. Home connections are often asymmetric: a "500 Mbit/s" plan may upload at 50. Test over the connection you will actually use — Wi-Fi in the bedroom can be far slower than a cable to the router.
How do I send a 100 GB file with StrongFolder?
The four steps above are all there is to it. The work is in the preparation:
- Recipient's disk. They need 100 GB free plus a margin. Ask before you start.
- Power and sleep. Plug in the laptop and set sleep and hibernation to "never" for the transfer. A sleeping computer ends the transfer.
- Wired if possible. An Ethernet cable is more stable than Wi-Fi over many hours.
- The right browser. Chrome, Edge or another Chromium browser on a computer works best for both sides; to save a whole folder with its structure the recipient needs one of them.
- Avoid peak usage. Large backups, cloud sync or video calls on the same connection slow the transfer down.
When the recipient opens the link, data flows straight from your disk to theirs over an encrypted WebRTC connection. Files are never uploaded to or stored on a StrongFolder server. If the 100 GB is a folder of many files, it arrives with its subfolders — see send a folder without zipping.
Free · in your browser · no sign-up
Should I split a 100 GB file into parts?
Splitting is a workaround for services with a cap. An archiver such as 7-Zip can cut a file into volumes (for example two 50 GB parts for SwissTransfer). It works, but:
- you need about 100 GB of extra disk space for the parts, and the recipient needs the same to join them;
- packing and unpacking 100 GB takes a long time;
- if one part is missing or corrupted, the whole archive fails to extract;
- the recipient has to download every part before they can open anything.
With a direct transfer there is nothing to split: the file is sent as it is. Splitting still makes sense if you must send while offline and the only free service with room is capped.
When is StrongFolder not the best choice for 100 GB?
- Your upload is under ~10 Mbit/s. 22+ hours with a computer that must stay awake is tough. Ship an SSD, or let a cloud sync app upload it over a few nights (with enough paid storage).
- You can't keep the computer on. A stored copy (cloud or transfer service) lets you disconnect after the upload.
- The recipient will download days later. The link works while the sender keeps sharing. When the sender clicks Stop Sharing or closes the tab, the files are no longer available.
- Several people will download it over weeks. A cloud drive serves each of them without using your connection.
More on this trade-off in why the sender stays online.
Summary
You can send a 100 GB file for free in two ways: split it for a large free transfer service, or send it directly peer to peer with no size cap and no upload. Either way, upload speed sets the time — check it first, prepare the sending computer, and keep it awake until the recipient finishes. For every method by size, see how to send large files; for exact requirements, see limits.