A Mac drive often uses a file system (like APFS or HFS+) that Windows cannot read natively, so the files will not appear in File Explorer even though the disk is connected.
First, confirm how Windows sees the disk:
- Press Windows key, type
diskmgmt.msc, and open Disk Management.
- Look for the Mac drive in the lower pane:
- If it shows as RAW or with an unknown file system and you need the files, do not format it. Windows cannot read APFS/HFS+ without third‑party tools.
- If it shows as Unallocated, that means Windows does not see any usable partition. Again, do not create a new volume if file recovery is needed.
If the disk is empty or the data is no longer needed:
- In Disk Management, if the partition is listed as RAW and known to be empty, right‑click it and select Format to create an NTFS or exFAT volume. Formatting erases all data on that partition.
- If it is listed as Unallocated and known to be empty, right‑click the unallocated space, choose New Simple Volume, and follow the wizard to create and format a new volume. This also erases any existing data structures on that space.
Only perform Format or New Simple Volume if there is no need to keep or recover the Mac data, because these actions erase data.
If files must be recovered from the Mac format, use a Mac system or appropriate third‑party tools that understand APFS/HFS+ before letting Windows change the disk.
References: