1 x 250Gb; internal
2 x 500Gb; 1 x internal + 1 x external (in housing with USB lead & mains lead); NB the housing can be opened easily & the HDD extracted to use elsewhere.
All have been wiped clean and formatted (MBR/NTFS). The internals were in a desktop (now replaced by SSDs). The external was in use as a backup device.
Prefer all to go together.