The problem
A drive can be readable but not writable. Its filesystem, mount state and permissions matter as much as the file manager.
A practical answer
Use GJ File Manager's external-device area to inspect a drive before starting a copy with visible progress.
Step by step
- Connect the drive and check its name, format and writable status.
- Open a small destination folder to confirm access.
- Copy a sample file, wait for completion and open the destination copy.
- Eject through the system after all tasks finish, then disconnect.
Know the limits
NTFS writing depends on system support and configuration; not every attached NTFS disk is automatically writable.
Common question
Can I unplug after a failed copy?
First confirm the task has stopped and check the destination. Safely eject rather than treating a partial file as a backup.
Official reference
Install or update through Apple's official listing. Check current pricing, in-app purchases, availability and system requirements there before downloading.
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