Leica CF Cards - MCF256 or MCF32 for a 2006 Leica System1200 GX1230 receiver ?

I have searched this forum with the AI assistant's help on this subject but can only see very high volume 1GB compact flash cards mentioned.

I expect this is a well worn old enquiry path I am taking gentlemen, so I beg your patience please. 

These Leica flash cards, and as mentioned in the search results,  are very expensive and there is some advice on the www that states a Leica branded MCF 256 flash card is essential for reliable fomating and subsequent data storage.  But also the www suggested that the lower volume MCF32 may give "better" performance.

I tried a cheap 256MB FC price £17 and although my pc recognises it the Leica GX1230 refuses to recognise and format the card.

Looks like I need to buy an MCF256 ?

These are priced in the UK between £140 and £190 plus 20% VAT.  The MCF32 is a similar price.