The risk of accidental exposure of confidential data on USB storage devices can be greatly mitigated by the use of encryption.
You can purchase hardware-encrypted USB storage devices, or else an encrypt a normal USB storage device using encryption software such as BitLocker (on Windows devices) and FileVault (on Macs).
You can also, if you so choose, use software to encrypt individual files.
As a general rule, if you need to store very large volumes of data on an external drive, it’s best to purchase a hardware-encrypted device, as the use of software encryption tends to slow the performance of the device considerably.
Good encryption still relies upon selecting a robust encryption method (256-bit AES is a good standard) and using a sophisticated passcode.
Please see LSE's Guide to Encryption.
You can also contact the IT Service Desk if you have any queries.