Looking at the IDE to SATA adapters, it does seem to add length to the setup, which on laptops is rarely spare length in the slot for the HDD.
Also an option similar to above may be to get an IDE to m.2 adapter card. a lot of them look like they take the overall form of the original HDD, but you can slot oa cheap m.2 SSD in there instead.
Yeah, that's the one. A cheap m.2 ssd is all you need as anything will be bottlenecked by the IDE interface
Not quite.
You need a MSATA SSD to go in that enclosure:
https://www.ebay.co.uk/itm/128GB-SAMSUNG-PM851-SSD-mSATA-solid-state-drive/333628048537
https://www.ebay.co.uk/itm/SAMSUNG-...HP-000D1-DP-N-00Y6FC-Dell-Laptop/293612566931
The linked SSD is M2 (PCI-Express)
They look almost identical, apart from the keying on the end of the connector.
Yeah, sorry, my mistake. I was really meaning not to get an nvme drive as leezer points out.