<p>You cannot recover control over the Bitcoin amount associated with the addresses in your old wallet data file unless you have a <a href="https://en.bitcoin.it/w/index.php?title=Securing_your_wallet&amp;redirect=no#Backup" rel="nofollow noreferrer">backup of the wallet</a> or a note of the <a href="https://en.bitcoin.it/wiki/Private_key" rel="nofollow noreferrer">private key</a>.</p>

CC BY-SA 4.0
2019-11-11T11:03:16.000Z
2019-11-11T11:03:16.000Z
RedGrittyBrick
<p>I lost an old .dat file with 1.5 BTC balance.</p>

<p>I created it with Bitcoin qt 0.8.6, I still have that exact program on my SD card.</p>

<p>I once heard each bitcoin qt wallet does contain a pool of about 100 addresses. Isn't my lost adress supposed to be in that program ? Can I re-generate the adress with that old qt ? If not what can I do ? Nothing I guess...</p>

CC BY-SA 4.0
2019-11-11T06:02:34.713Z
Yes it generates a pool of future addresses, but those are stored in your `wallet.dat` file. Without the file, there is unfortunately nothing you can do.
Pieter Wuille
<lost-wallet>
Lost .dat file but
Theodore.us
# Lost .dat file but

(Asked by: username_0 on 2019-11-11)

I lost an old .dat file with 1.5 BTC balance.

I created it with Bitcoin qt 0.8.6, I still have that exact program on my SD card.

I once heard each bitcoin qt wallet does contain a pool of about 100 addresses. Isn't my lost adress supposed to be in that program ? Can I re-generate the adress with that old qt ? If not what can I do ? Nothing I guess...

**Tags:** lost-wallet

> **Comments:**
> **username_1**: Yes it generates a pool of future addresses, but those are stored in your `wallet.dat` file. Without the file, there is unfortunately nothing you can do.  

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## 1 answers

### Answer by username_2 on 2019-11-11. Score: 2

You cannot recover control over the Bitcoin amount associated with the addresses in your old wallet data file unless you have a [backup of the wallet](https://en.bitcoin.it/w/index.php?title=Securing_your_wallet&redirect=no#Backup) or a note of the [private key](https://en.bitcoin.it/wiki/Private_key).


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