Devices Computers: speed, memory and buying well
Is 256GB enough for a laptop?
A 256 GB drive shows as 238 GB in Windows and leaves about 138 GB for you. The worked budget, what fits in it, and who should buy 512 GB.
The short answer
- 256 GB is enough for a laptop used for browsing, office work and video calls with files kept in the cloud, and not enough for current games, video editing or a local photo library.
- Windows shows a 256 GB drive as about 238 GB because it counts in binary units, while a Mac shows the full 256 GB; no space is actually missing.
- After planning for Windows 11 at Microsoft's 64 GB minimum and keeping about 15 percent free for SSD speed, roughly 138 GB is left for your apps and files.
- Large current games list 70 to 150 GB each on Steam, so a 256 GB laptop holds one big game at a time at most.
- If your current computer holds more than about 100 GB of your own files and apps, buy 512 GB or more, or a model with a replaceable drive.
Yes, if the laptop runs a browser, office apps, email and video calls, and your photos and documents live mostly in cloud storage. No, if you install big games, edit video or keep a large photo library on the machine itself. The arithmetic is tighter than the label suggests. Windows shows a 256 GB drive as about 238 GB before anything is installed, Microsoft will not install Windows 11 on a drive smaller than 64 GB, and an SSD needs roughly 15 percent left free to stay quick. Plan on about 140 GB for your own apps and files. A single current game can ask for 150 GB.
Why a 256 GB drive shows about 238 GB
Nothing is missing. Drive makers count a gigabyte as one billion bytes, and Apple's own spec pages say so in the footnote: 1 GB equals 1 billion bytes, actual formatted capacity less. Windows counts in units of 1,073,741,824 bytes (two to the thirtieth power) and still calls them GB. Divide 256 billion bytes by that figure and you get 238.4, which is what File Explorer shows. The same bytes, a different ruler, about 7 percent smaller on paper.
A Mac reads the same drive as 256 GB. Apple says only OS X Leopard and earlier, and iOS 10 and earlier, reported storage in binary units, so current Macs use the decimal count printed on the box. The gap is exactly the one that makes a new phone look smaller than its label, which is covered from the phone side in why the system takes so much of a full phone.
You will also see a figure of around 218 GB repeated on answer sites. The conversion does not produce it: the conversion accounts for about 17.6 GB and is the only fixed part of the gap. Everything after that depends on what the system and you put on the drive.
A worked budget for a 256 GB Windows laptop
Microsoft's Windows 11 specification asks for a 64 GB or larger storage device, and says the size of the installed system and the free space needed for updates are highly variable. Windows sets aside reserved storage for updates, temporary files and system caches so that an update never fails for lack of room, and when Microsoft introduced it, the company said it would start at about 7 GB and vary over time with how the device is used. Using the 64 GB minimum as the system's share is a planning figure, not a measurement, but it is the room Microsoft itself asks for.
| Step | Space | What is left |
|---|---|---|
| Capacity printed on the box | 256 GB (decimal) | 256 GB |
| Same drive as Windows reports it | Minus about 17.6 GB of unit conversion | About 238 GB |
| Windows 11, reserved storage and room for updates | Planned at Microsoft's 64 GB minimum | About 174 GB |
| Free space kept so the SSD stays fast | About 15 percent of 238 GB, roughly 36 GB | About 138 GB |
| Microsoft 365 apps | 4 GB on Windows, 10 GB on a Mac (Microsoft's listed requirement) | About 134 GB |
Preinstalled manufacturer software and any recovery partition come out of the remaining 134 GB too, and both vary by brand. On a Mac the conversion line disappears, but the office suite asks for more.
What fits in the space that is left
Documents barely register. What fills a laptop is games, video and photo libraries, and games are easy to measure because publishers list the space they need. These are the requirements listed on Steam for five well known titles, set against the roughly 138 GB left after the system and the free space margin.
| What you install | Space the publisher lists | Share of the 138 GB left |
|---|---|---|
| Microsoft 365 apps on Windows | 4 GB | 3 percent |
| Microsoft Flight Simulator 2024 | 50 GB | 36 percent |
| Cyberpunk 2077 | 70 GB, SSD required | 51 percent |
| Counter-Strike 2 | 85 GB | 62 percent |
| Baldur's Gate 3 | 150 GB, SSD required | Does not fit |
| Red Dead Redemption 2 | 150 GB | Does not fit |
The pattern matters more than the titles. One large current game takes more than a 256 GB laptop has to give, and a mid sized one takes half. If you play, 256 GB holds one game at a time.
Video is the other heavy user. Apple says ProRes video files from an iPhone are up to 30 times larger than the same clip in the default HEVC format, and Apple itself limits 128 GB iPhones to 1080p at 30 frames per second in ProRes. Anyone editing video or keeping years of footage locally should start at 512 GB and plan on an external drive as well.
Running AI models on the laptop belongs in the same category, since each model is one large file. What is realistic on a personal machine is set out in running AI on your own device.
The cloud is what makes 256 GB work
People who are happy on 256 GB are usually leaning on a sync service. On Windows, OneDrive Files On-Demand is switched on by default: every file appears in File Explorer, but files marked online-only take up no space until you open them. On a Mac, the Optimize Storage feature uses iCloud to make room automatically when space runs low, and Apple notes that what it moves counts against your iCloud storage plan. Google gives each account up to 15 GB, shared across Gmail, Drive and Photos.
That arrangement has limits. An online-only file is not on the laptop, so on a plane it does not open. The free tiers are small, so a cloud dependent setup usually means a paid plan, a recurring cost to set against the price of a bigger drive. And a sync folder mirrors deletions, so it is not a backup: delete a file on the laptop and it disappears from the cloud too, which is why a backup arrangement that survives a mistake still matters on a cloud first machine.
Photo libraries matter most here, because they are large, they grow every year and they are irreplaceable. A system that keeps full resolution originals safe while the laptop holds only previews is described in a photo backup and sorting system that holds.
Why a nearly full drive costs more than space
A full drive does not simply refuse new files. An SSD needs spare blocks to write efficiently, so it slows down as it fills, which is why the budget above keeps about 15 percent free and why a full drive is one of the first things to check in the usual causes of a slow computer. The same drive also holds the page file Windows uses when memory runs short, so a machine short of both is slow twice over, a trade explained in how much RAM a computer really needs.
Updates are the quieter cost. Microsoft's own help page for freeing drive space says Windows may report that it needs more space to install the latest feature update, and offers plugging in an external drive as a way to complete it. An update that waits for free space is a security fix that waits too, which is why installing updates promptly depends partly on having room for them.
Can you add storage later?
Sometimes, so check before you buy. Many Windows laptops use a replaceable M.2 drive, so a 256 GB model can become 1 TB with a new part and a cloned copy or reinstall. Some thin models solder storage to the board, and then the capacity you buy is the capacity you keep. The questions that separate the two are in the laptop buying checklist, alongside the parts that matter more than storage.
The market is moving too: Apple's current MacBook Air specification page lists 512 GB as the smallest configuration. An external SSD is the fallback for any machine: fine for a photo archive or a game library you do not play daily, less convenient for anything you need with you all the time.
How to decide in five minutes
- On your current computer, open the storage screen: Settings, System, Storage on Windows, or System Settings, General, Storage on a recent Mac. Note how much space your own apps and files use, leaving out the system.
- If that figure is under about 100 GB, you do not game, and you are content keeping photos in the cloud, 256 GB will do.
- If it is over 100 GB, or you play current games, edit video or keep your photo library locally, buy 512 GB or more.
- If the model you like comes only in 256 GB, check whether the drive is replaceable. If it is, buy it and upgrade later. If it is soldered, buy the next size up now.
- Whatever you buy, set up cloud sync and a separate backup on day one, before the drive has a chance to fill.
Common questions
Is 256GB enough for a student laptop?
For most students, yes. Coursework, office apps, a browser and lecture notes fit comfortably in the roughly 130 GB a 256 GB Windows laptop leaves free, especially with files kept in a school or personal cloud account. The exceptions are courses that use large software: video production, architecture and engineering design tools, and game development. Check the software list for the course before buying, because those programs alone can take tens of gigabytes.
Why does my 256GB laptop only show 238GB?
Because Windows measures in binary units and the box uses decimal ones. A drive sold as 256 GB holds 256 billion bytes, and Windows divides that by 1,073,741,824 bytes per gigabyte, giving 238.4. No space is lost or used. A Mac shows the same drive as 256 GB because it counts in decimal, like the manufacturer.
Is 256GB enough for gaming?
Only for one or two games at a time. Big current titles list 70 to 150 GB each on their store pages, and a 256 GB Windows laptop leaves roughly 138 GB once the system and a sensible free space margin are accounted for. Lighter and older games are much smaller, but anyone who plays recent releases regularly should treat 1 TB as the practical size.
Is a 256GB SSD better than a 1TB hard drive?
For speed, yes, by a wide margin. A mechanical hard drive makes startup and app loading slow no matter how fast the rest of the laptop is, while a solid state drive feels quick every day. For capacity the hard drive wins. If you need the space, the better answer is a larger SSD, or a 256 GB SSD plus an external drive for archives.
Can I upgrade a 256GB laptop SSD later?
If the laptop uses a replaceable M.2 drive, yes, and it is one of the cheaper upgrades available. You fit the new drive, then either clone the old one onto it or reinstall the system and restore your files. If the storage is soldered to the board, it cannot be upgraded, and an external drive is the only way to add space. Check the specific model before buying.