At a glance
Plan a realistic evening upload
Total space for the work you keep in your library.
Maximum file size in the temporary-transfer workflow.
If your actual upload speed is 20 Mbps, a 50 GB file takes about 5 hours 33 minutes before overhead. Starting at 8 pm does not mean it will be ready at 9 pm. Plug the laptop in, keep it open, and give the receiver a delivery time with some breathing room.
Follow these steps
- 01
Check the real file size
Look at the file details on your device. The file must be 50 GB or smaller.
- 02
Use a steady connection
Use a wired connection if you can. Keep the device plugged in and stop it from sleeping.
- 03
Choose the file
Open TransferSize, select Choose files, pick the file, and select Continue.
- 04
Create a link
Set the expiry and a password if you need one, then start the upload.
- 05
Leave the page open
Wait until Transfer ready appears. Then copy and test the link.
The recipient opens the transfer link in a browser, enters the password if one was set, previews supported files when enabled, and downloads without creating an account.
Keep this in mind
Know what happens next
50 GB is the size of the file
Look at the file’s size in Finder on a Mac or File Explorer on Windows. The free file limit does not mean your free account can permanently store 50 GB: My Files has its own allowance. A temporary send and persistent storage solve different jobs. The uploader checks the applicable limit before the transfer can finish.
Read the upload number on your speed test
Internet plans often advertise download speed first. That is how quickly you receive things. Sending a large file uses upload speed, which may be much lower. At a steady 100 Mbps upload, 50 GB takes about 1 hour 7 minutes before overhead. At 10 Mbps, it takes about 11 hours 7 minutes. These are calculations, not promised TransferSize speeds.
Set the computer up for the long run
Connect the charger. Use a reliable network, preferably a wired connection when available, and temporarily keep the computer from sleeping. Restore your normal sleep setting when the transfer is done. Make sure the source file is stored on the device or an attached drive that will remain available; an online-only cloud placeholder may need to download first.
Why the time-left number changes
The estimate is based on recent progress. Wi-Fi, competing uploads, a slow external drive, and the final verification stage can change it. A sudden change does not mean your file changed size. If the connection drops, keep the tab open so interrupted parts can be retried.
Leave room for receiving, too
Your recipient needs storage for the downloaded file. If it is a ZIP, extracting it can require additional space for its contents. Tell them the size in advance and choose a link expiry that gives them time to download. Seven days of availability is not seven days of guaranteed recovery afterward.
Want the technical detail?
The estimate uses decimal GB: seconds ≈ file size in GB × 8,000 ÷ upload speed in Mbps. Protocol overhead and retries add time. GB and GiB are different units, so your operating system’s displayed size can differ from the service’s calculation.
Questions people ask
Can I close my laptop?
No. Keep it powered, awake, and connected until the upload finishes.
What if the file is larger than 50 GB?
Plus allows up to 250 GB per file, Pro 500 GB, and Business 1 TB.
Will splitting the file make the upload faster?
Not necessarily. Smaller archives can be easier to retry manually, but your connection still determines the total upload time.
Choose your files and follow the steps above.