How much room a saved video needs
Every download ends as bytes written to your own storage, so the space you have left decides whether the transfer finishes.
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Files go straight to your device.
Storage is the requirement nobody checks first
Analyze needs an address. Downloading needs space. The second requirement is the one people skip, and it is the one that ends a transfer halfway through.
The results list prints a size in megabytes on every row. That figure is the amount of storage the finished file occupies. A 340 MB row writes roughly 340 MB to your drive, and nothing about the transfer shrinks it afterwards.
Turning the size column into a storage decision
Read the size figure before anything else on the row. Compare it against the free space on the drive your browser saves to, not against the total capacity of that drive.
A drive reporting 4 GB free holds about a dozen files of 340 MB. A drive reporting 400 MB free holds one, and then it is full.
- One gigabyte is 1,024 megabytes, so divide the row figure by 1,024 to read it in gigabytes.
- Leave a margin. A drive filled to the last megabyte slows the whole machine and blocks ordinary work such as saving a document.
- The figure on the row covers the video only. Nothing else is added to it on the way to your device.
What a full disk does to a transfer in progress
Your browser writes the file as it arrives rather than all at once at the end. When the space runs out partway through, the write fails and the browser stops.
Chrome and Edge mark the entry in the downloads list as failed. Safari leaves a partial file behind. In both cases the part already written stays on the disk and continues to occupy space, and it stops playing at the point where the writing stopped. Delete that fragment before you try again, or you are competing with your own leftover file for the room you need.
Checking the free space on a computer
On Windows, open File Explorer and select This PC. Each drive shows a bar with the free space and the total space printed underneath it.
On macOS, open the Apple menu, choose System Settings, then General, then Storage. The bar at the top reports what is available. Check the drive holding your Downloads folder, which is the system drive unless you moved it.
Checking the free space on a phone
On Android, open Settings and then Storage. The figure at the top is what remains.
On iPhone, open Settings, then General, then iPhone Storage. The bar takes a few seconds to fill in, and the list underneath shows which apps hold the most. Phones handle a tight disk worse than computers do, because the system reserves part of the storage for its own work and refuses new files well before the number reaches zero.
Making room without losing anything
Empty the recycle bin or the trash first. Deleted files sit there and keep occupying space until it is emptied.
Then look at the Downloads folder itself, which collects installers, archives and duplicates that nobody revisits. Moving finished videos to an external drive frees the same space as deleting them and keeps the files. On a phone, photographs already backed up to a cloud account can come off the device while staying in the account.
The free size ceiling and your disk are separate limits
Free use caps a single file at 150 MB. That is a limit on what gets prepared for you, not a statement about your device.
A phone with 60 MB free still fails on a 140 MB file that the tool allows. Pro removes the 150 MB ceiling, removes the daily count of three and removes the ads, and it adds no storage to your device. Space is yours to arrange either way.
Questions about space and storage
How do I know how much space a video needs before I download it?
Read the size figure printed on the row you are considering. That number in megabytes is what the finished file occupies on your storage once it lands.
The download failed partway through. Was that my storage?
Check the free space on the drive your browser saves to. When space runs out during a transfer, the write fails and the browser stops with a partial file on disk.
Does the partial file left behind still take up room?
Yes. The part already written stays on the disk and keeps the space it used. Delete it before starting the download again, so you are not competing with it.
Can I send the download to a different drive?
Yes. Turn on the ask-where-to-save setting in your browser, and every download then opens a dialog where you pick the drive and the folder yourself.
Why does my phone refuse a file when the numbers say there is room?
Phone systems reserve part of the storage for their own work and stop accepting new files before the figure reaches zero. Clear a few hundred megabytes more than the row size.
Does Pro give me more space?
No. Pro removes the daily count of three, the 150 MB single-file ceiling and the advertising. Storage on your own device is separate from all of that and unchanged.