I had that too with a cf-card, coffin or apolloOS run fine.
But after a reset the card seem the be unreadable/empty.

The 128gb kingston from the shop works fine.
And other cards also seem to do a good job, you just need to find one that match.
Ironicly Sandisc often also works good.

Back in the days of atari i had the same.
After analise a write seem to be shifted up or down some bytes to another place.
That of course ruined the information on it.

The V4 is good, else it would not started the first time.

Also can you please give us more information and explain what you did and why..
   
1) When did you get your V4?
 
2) The V4 systems are normally shipped with a 128 GB Kingston.
You not use the 128GB? Did I understand you right you use a 32GB Sandisk?
 
3) Which core version are you using, and which AplloOS and COffin versions?

4) Which tool did you use to flash your CF?

5) Please be so kind and list what hardware is connected to the V4
 
Thanks
 

2) mine was shipped with a Sandisk Extreme 32gb UDMA7.

3) I upgraded to the latest core few data ago and I am using ApolloOs R9.4 or Coffin R62. I have the same result with other versions likes Coffin R57 for example.

4) to flash I have tried BalenaEtcher and Win32diskimager.

5) to my V4 I connect a Omen keyboard, a wimitech mouse and a Tvled.

I tried several times to burn the CF but at the First Power cycle I get and error on the CF card.

I bought another Sandisk and have the same behaviour.

Any idea?

OK I understand now.
So you use the card 3 years already.
That you made your forum account just now and your post confused me , this made me think you got the card just now.

 

Daniele Petruzziello wrote:

3) I upgraded to the latest core few data ago and I am using ApolloOs R9.4 or Coffin R62. I have the same result with other versions likes Coffin R57 for example.

Which core version did you flash?
Did you take the stable or alpha test release?

 

Daniele Petruzziello wrote:

4) to flash I have tried BalenaEtcher and Win32diskimager.

BalenaEtcher has a good reputation.

Daniele Petruzziello wrote:

I tried several times to burn the CF but at the First Power cycle I get and error on the CF card.

How do you power cycle?
With CTRL A A?
Or do you a software program?

At which point did you power cycle?
Please note that Coffin uses PFS filesystem which will write a lot to disk on boot. If you power cycle during a write activity this  can cause filesystem damage.

half the problemi is gone, I changed keyboard with a wimitech keyboard instead of Omen game keyboard by HP and now Apollo R.9.4 seems to work fine.
 
I have the latest stable core 9465 installed.
 
But I cannot understand why if I swap CF with amother card with installed the latest Coffin (R62) it shows a window saying that there Is no disk device in dho:
 
 
any idea?