Gioi han file 4 GiB cua FAT32 - vi sao video lon that bai tren USB
FAT32 van la dinh dang san tren nhieu USB stick va the SD, va no tu choi moi file lon hon 4 GiB tru 1 byte (4,294,967,295 byte). Cho trong tren stick khong giup gi - video 4.7 GB, anh dia, hay ban cai game van copy that bai du o dia nhin nhu con trong. Cach lam on dinh la format lai sang exFAT hoac NTFS, hoac chia payload thanh cac phan nho hon bang cong cu ZIP file.
Last reviewed: 2026-07-18
Chuyen gi da xay ra
Bang so sanh he thong file cua Microsoft liet ke kich thuoc file toi da cua FAT32 la 4 GiB. Tran do den tu truong do dai file 32-bit trong muc luc FAT, nen kich thuoc hop le lon nhat la 2^32 - 1 byte. Volume co the lon hon; tran moi-file tach biet voi cho trong stick bao cao. exFAT va NTFS deu quang cao toi da ly thuyet 2^64 - 1 byte trong cung bang, nen format lai thuong lam ban copy thanh cong.
Da doi chieu voi Microsoft Learn (File System Functionality Comparison) va tai lieu ho FAT vao 18 July 2026:
| He thong file | Kich thuoc 1 file toi da | Dung USB thuong gap |
|---|---|---|
| FAT32 | 4 GiB - 1 byte | Mac dinh tren nhieu USB re va the may anh |
| exFAT | 2^64 - 1 byte (thuc te khong gioi han cho media) | USB / SD file lon da nen tang |
| NTFS | 2^64 - 1 byte | O dia ngoai Windows |
Tran nay nam trong thiet ke FAT32 tu giua thap nien 1990. No van can nam 2026 vi USB van ship FAT32 de tuong thich toi da, trong khi video 4K, ISO Windows, va ban cai game thuong vuot 4 GiB.
Tai sao dieu nay anh huong file hang ngay
Thong bao loi thuong bao stick day khi thuc te chua day - OS tu choi mot file qua lon, khong phai tong cho trong. Lech do xuat hien khi chuyen dump may anh, copy ISO game, hoac luu man hinh dai xuong USB. Thiet bi chi doc FAT32 (mot so TV, am thanh o to, may anh cu) khong doc exFAT/NTFS neu khong format lai, nen chon dinh dang la doi trao giua file lon va do phat lai rong.
Lam gi voi file cua ban bay gio
Neu ban copy that bai quanh moc 4 GiB tren stick van con cho trong, cac lua chon sau phu hop truong hop thuong gap:
- Chia payload thanh cac phan ZIP duoi 4 GiB. Cong cu ZIP file co the dong folder lon thanh archive de ban kiem tra kich thuoc truoc khi copy USB.
- Giai nen archive tren o dia day du truoc. Cong cu unzip file va huong dan giai ZIP RAR 7Z giu buoc giai ra khoi stick bi gioi han.
- Format lai stick sang exFAT khi moi thiet bi tren duong di deu ho tro. Cach nay bo tran 4 GiB va van dung duoc tren Windows, macOS hien tai, va nhieu may anh.
- Dung NTFS khi stick chi o trong workflow Windows. Cung dau du file lon; yeu hon tren TV khoa chat va mot so may choi game.
Sources
- Microsoft Learn - File System Functionality Comparison (checked 2026-07-18)
- Microsoft Learn - exFAT specification
- Wikipedia - File Allocation Table (FAT32 max file size = 4,294,967,295 bytes)