You cannot add storage to an SD card itself — you need a larger card
SD cards have fixed storage. A 64GB card holds 64GB; you cannot expand it to 1TB by any method. What you can do is move your files to a larger SD card, then use the larger one in place of the original. The process takes 20 to 40 minutes depending on how much data you have and which tool you use.
The most common approach is to copy everything from your current card to a computer, then copy it all to the new larger card. This works for any device — cameras, phones, tablets, Nintendo Switch, drones, or dashcams. You keep all your files and settings intact.
A second option is to use a card cloning tool, which copies the entire card sector-by-sector, including the operating system and all settings. This is faster if your current card is nearly full, but it requires specific software and a card reader that supports it.
Key Takeaways
- SD cards cannot be expanded; you must buy a new card with the storage size you need and transfer your files to it.
- Moving files via a computer is the safest method and works with any card reader and any device that uses SD cards.
- A 1TB SD card costs more than smaller cards but holds the same number of files — the size difference is physical, not in how many photos or videos fit.
- Before you buy a new card, check your device's maximum supported capacity, because older cameras and phones may not recognize cards larger than 256GB or 512GB.
- Keep your old card until you confirm all files copied correctly and your device works normally with the new card.
Check your device's maximum card size before buying
Not every device accepts 1TB SD cards. Older cameras, phones, and gaming consoles may have a maximum supported capacity of 256GB, 512GB, or even 64GB. Using a larger card than the device supports can cause the card to be unrecognized or to work only partially.
Look up your device's specifications online — search "[device name] maximum SD card size" — or check the manual. If your device maxes out at 512GB, a 1TB card will not work. In that case, buy the largest card your device supports instead.
For most modern phones, tablets, and cameras made after 2018, 1TB cards work fine. Nintendo Switch, GoPro, DJI drones, and recent Canon and Nikon cameras all support 1TB cards. If your device is older, verify first.
Copy your files to a computer first
Insert your current SD card into a card reader connected to your computer. On Windows, the card appears as a removable drive in File Explorer. On Mac, it appears on the desktop and in Finder. Open the card and select all files — press Ctrl+A on Windows or Command+A on Mac.
Copy the files to a folder on your computer's hard drive. Right-click and choose Copy, then navigate to a folder (such as Documents or a new folder called "SD Card Backup") and paste. This usually takes 5 to 15 minutes depending on how much data is on the card.
Do not eject the card yet. Leave it connected and verify that all files copied by opening the folder on your computer and checking that the file count and sizes match what was on the card. If you see the same number of files and the total size is the same, the copy worked.
Insert the new 1TB card and copy files to it
Eject your old card safely — on Windows, right-click the drive and choose Eject; on Mac, click the eject icon next to the card name in Finder. Remove the old card and insert the new 1TB card into the same reader.
The new card may appear as "New Volume" or with no name. Open it in File Explorer or Finder. It should be empty. Select all the files you copied to your computer, copy them, and paste them into the new card. This takes longer than the first copy — usually 10 to 25 minutes — because you are writing to a fresh card.
When the copy finishes, verify again: open the new card and confirm the file count and total size match. If everything looks correct, safely eject the new card.
Test the new card in your device before discarding the old one
Insert the new 1TB card into your device. Power it on and navigate to the files or photos — open the camera roll on a phone, the photo library on a camera, or the file browser on a computer. You should see all your files in the same folders and organization as before.
Take a test photo or video if your device supports it. This confirms the card is writable and your device recognizes it fully. Check that the device shows the correct storage capacity — it should display something like "953GB available" (1TB cards show slightly less because of how storage is calculated).
If everything works, you can format and reuse the old card, sell it, or keep it as a backup. Do not throw it away until you are certain the new card is working reliably.
Use card cloning software if you want to preserve settings
Cloning copies the entire card, including the operating system, app settings, and hidden system files. This is useful if your device stores preferences or configurations on the card itself — some older cameras and gaming devices do this.
On Windows, tools like Macrium Reflect Free or AOMEI Backupper can clone an SD card. On Mac, Disk Utility (built into macOS) can do this. Insert both the old and new cards into readers, open the cloning software, select the old card as the source and the new card as the destination, and start the clone. The process takes 30 to 60 minutes depending on how full the old card is.
Cloning is slower than copying files but guarantees that everything on the old card — including things you cannot see — transfers to the new card. If your device works perfectly with the old card and you want to preserve that exact state, cloning is the safest method.
What to look for when buying a 1TB SD card
SD cards come in three physical sizes: SD (full-size), SDHC (same size, newer standard), and microSD (tiny, used in phones and small devices). Make sure you buy the size your device uses. Most cameras use full-size or SDHC; most phones use microSD.
Speed matters if you record video or take many photos in quick succession. Look for a card labeled "V30" or higher — this means it can write at least 30 megabytes per second, which is fast enough for 4K video. For casual photo storage, any 1TB card works, but V30 is worth the small extra cost.
Brand matters less than speed and capacity, but SanDisk, Kingston, Lexar, and Samsung are reliable. Avoid extremely cheap cards from unknown brands, as they may fail or have less actual storage than advertised. A 1TB SD card typically costs between $80 and $150 depending on speed rating and brand.
Frequently Asked Questions
Will my old files be erased when I insert the new card?
No. Your files stay on the old card until you format it. The new card is empty until you copy files to it. Keep the old card inserted in a reader or stored safely until you confirm the new card works in your device.
Can I use a microSD card with an adapter instead of buying a full-size 1TB card?
Technically yes, but it is not recommended. MicroSD cards in adapters sometimes disconnect or fail to be recognized, especially in older devices. If your device accepts full-size SD cards, buy a full-size 1TB card. If it only accepts microSD, buy a 1TB microSD card directly.
What if my device does not recognize the new 1TB card?
First, power off your device completely and reinsert the card firmly. Power it back on. If it still does not recognize the card, your device may have a maximum supported capacity lower than 1TB. Check your device's specifications. If it maxes out at 512GB, you need a smaller card instead.
How long does it take to copy 1TB of files?
Copying 1TB from a computer to a new SD card usually takes 20 to 40 minutes, depending on your computer's USB speed and the card's write speed. Using a USB 3.0 reader is faster than USB 2.0. If your computer is older or the reader is slow, it may take an hour or more.
Can I use the new card while files are still copying?
No. Wait until the copy finishes completely and you safely eject the card. Using the card while data is writing can corrupt files or damage the card. Always wait for the progress bar to reach 100 percent and the system to confirm the copy is done.