The Samsung Galaxy S25 has no SD card slot for expandable storage
The Samsung Galaxy S25, S25+, and S25 Ultra all ship without a microSD card slot. Samsung removed expandable storage from this line entirely. If you need more storage than your phone comes with, you cannot add it through a card—you have to choose your storage capacity when you buy the phone, or use cloud storage and external drives instead.
This is not a new decision for Samsung. The company stopped including SD card slots in its flagship Galaxy S series starting with the S20 in 2020. The S25 continues that pattern. If you own an older Samsung phone with a slot and are upgrading, this will be a real change in how you manage files.
Key Takeaways
- All three S25 models (S25, S25+, S25 Ultra) lack microSD card slots and cannot accept expandable storage cards.
- You must select your storage capacity at purchase—options typically range from 128 GB to 1 TB depending on the model.
- Cloud storage through Google Drive, OneDrive, or Samsung Cloud can hold photos, videos, and documents without using phone storage.
- External USB-C drives and portable SSDs can back up files, but they do not expand the phone's internal storage for apps and system use.
Storage options available on the S25 lineup
The S25 comes in fixed storage tiers. The base S25 starts at 128 GB or 256 GB depending on your region and carrier. The S25+ offers 256 GB and 512 GB. The S25 Ultra goes up to 512 GB or 1 TB on some carriers. Once you choose, that is your storage for the life of the phone—you cannot upgrade it later.
Before you buy, think about what takes up the most space on your phone. Video recording, especially at high resolution, uses storage fast. A 10-minute 4K video can take 2 to 3 GB. Photos add up too, particularly if you use the phone's native camera app or store raw files. Apps themselves vary widely—some games and productivity apps run 500 MB to 2 GB each.
How cloud storage replaces an SD card for photos and documents
Google Photos, OneDrive, and Samsung Cloud all let you store photos and videos off the phone. Google Photos offers unlimited storage for compressed photos if you have a Google account, though the compression is noticeable on very large prints. OneDrive gives you 5 GB free and more if you pay. Samsung Cloud provides 15 GB free to S25 owners and integrates directly into the phone's settings.
The advantage of cloud storage is that you can delete the files from your phone and still access them from any device. The downside is that you need an internet connection to view or read them, and if your connection is slow or unreliable, this becomes frustrating. Cloud storage also does not help with app storage or system files—those stay on your phone.
External drives and what they can and cannot do
You can connect a USB-C external drive or portable SSD to the S25 and copy files to it. This works well for backing up large video projects, photo libraries, or documents. The S25 supports USB-C On-The-Go (OTG), which means the phone can read from external drives without needing a computer in between.
However, external drives do not expand your phone's usable storage. Apps still install on the phone's internal drive. System files, caches, and temporary data still live there. An external drive is a backup tool and a way to carry large files around, not a way to give yourself more room for the phone to operate. If your internal storage is full, an external drive will not fix that problem.
Why Samsung removed the SD card slot
Samsung has stated that removing the slot allows for a thinner phone, more water resistance, and a cleaner internal design. The S25 is rated IP68 for dust and water resistance—it can survive submersion in up to 1.5 meters of fresh water for 30 minutes. A slot would require a rubber gasket and more complex sealing, which adds thickness and complexity.
The company also argues that cloud storage and faster internal storage make a physical card less necessary than it was five or ten years ago. Whether that argument holds for your own use depends on how much you record, how often you travel without reliable internet, and whether you prefer to own your files outright rather than trust them to a service.
Comparing the S25 to other phones with SD card slots
If expandable storage is important to you, other Android phones still offer it. The Samsung Galaxy A series (A15, A25, A35) includes microSD slots on most models. Google's Pixel phones do not have slots. OnePlus flagships typically do not. Motorola's mid-range phones often do. Before you commit to the S25, check whether the phones you are comparing it to have slots and how much that matters to your workflow.
The trade-off is real: phones with SD card slots tend to be thicker, heavier, or less water-resistant than flagships without them. If you need both expandable storage and a premium phone, you are choosing between two different design philosophies, and neither is objectively wrong.
How to manage storage on the S25 if you do not have an SD card
Start by understanding what is using your storage. Go to Settings > Storage to see a breakdown by category—apps, photos, videos, documents, and cache. Delete apps you no longer use. Move photos and videos to cloud storage or an external drive regularly, not just when you run out of space. Use the phone's built-in storage management tools to clear cached data, which can free up several gigabytes without deleting anything you care about.
When you buy your S25, buy more storage than you think you need. The difference in price between 256 GB and 512 GB is usually smaller than you expect, and running out of storage partway through owning the phone is frustrating. If you record video often or keep a large photo library on the phone, 512 GB is a safer choice than 256 GB.
Frequently Asked Questions
Can I use a USB-C adapter to add an SD card to the S25?
You can connect a USB-C card reader to the S25 and read files from an SD card, but the phone will not treat the card as internal storage. You can copy files from the card to your phone or vice versa, but apps cannot install on the card, and the phone cannot use it to expand its working storage space.
Will a future software update add SD card support to the S25?
No. The S25 has no physical slot, so no software update can enable it. The hardware straightforward is not there. If you need an SD card slot, you would need to choose a different phone model.
How much storage do I actually need on the S25?
That depends on how you use the phone. If you mostly use apps, email, and messaging, 128 GB is usually enough. If you record video, take lots of photos, or keep large files on the phone, 256 GB or more is safer. Consider how long you plan to keep the phone and how much you record in a typical month.
Is Samsung Cloud better than Google Photos for the S25?
Samsung Cloud integrates more tightly with the phone's settings and backs up more data types, including messages and app data. Google Photos is more universal—you can access it from any device and any platform. Neither is objectively better; it depends on whether you prefer Samsung's ecosystem or Google's.
What happens if I fill up the S25's storage completely?
The phone will slow down, the camera may stop working, and you will not be able to install updates. You will need to delete files or move them to cloud storage or an external drive to free up space. This is why buying more storage upfront is worth the cost.