# How to import the blockchain and proving key from another system? **URL:** \ **Category:** Technical Support\ **Created:** [April 19, 2018, 3:11pm UTC](https://forum.zcashcommunity.com/t/how-to-import-the-blockchain-and-proving-key-from-another-system/28343 "2018-04-19T15:11:23Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![scorn](https://avatars.discourse-cdn.com/v4/letter/s/bb73d2/32.png) [@scorn](https://forum.zcashcommunity.com/u/scorn)\ **Post date:** [April 19, 2018, 3:11pm UTC](https://forum.zcashcommunity.com/t/how-to-import-the-blockchain-and-proving-key-from-another-system/28343/1 "2018-04-19T15:11:24Z")
Let’s say I have the blokchain and the proving key (aka. public parameters) on one system. If I’m moving over to a new system (which runs Debian), where should I place each of these and how should I start up Zcash so that I won’t have to re-download anything? Thank you very much for your help here and also in other threads! ---
**Author:** ![garethtdavies](https://sea2.discourse-cdn.com/zcash/user_avatar/forum.zcashcommunity.com/garethtdavies/32/210_2.png) [@garethtdavies](https://forum.zcashcommunity.com/u/garethtdavies)\ **Post date:** [April 19, 2018, 4:24pm UTC](https://forum.zcashcommunity.com/t/how-to-import-the-blockchain-and-proving-key-from-another-system/28343/2 "2018-04-19T16:24:30Z")
Just checking on my node and public params are stored in ~/.zcash-params and all the other stuff is contained in ~/.zcash (unless you explicitly told it otherwise) so copying both those folders I’d imagine would suffice. ---
**Author:** ![scorn](https://avatars.discourse-cdn.com/v4/letter/s/bb73d2/32.png) [@scorn](https://forum.zcashcommunity.com/u/scorn)\ **Post date:** [April 20, 2018, 6:29pm UTC](https://forum.zcashcommunity.com/t/how-to-import-the-blockchain-and-proving-key-from-another-system/28343/3 "2018-04-20T18:29:20Z")
It worked, thank you!