# Are databases created within DT4 compatible with DTTG?

**URL:** <https://discourse.devontechnologies.com/t/are-databases-created-within-dt4-compatible-with-dttg/82831>\
**Category:** DEVONthink\
**Tags:** dt4\
**Created:** [April 7, 2025, 4:35pm UTC](https://discourse.devontechnologies.com/t/are-databases-created-within-dt4-compatible-with-dttg/82831 "2025-04-07T16:35:43Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![okdeinfrgk](https://discourse.devontechnologies.com/letter_avatar_proxy/v4/letter/o/dfb087/32.png) [@okdeinfrgk](https://discourse.devontechnologies.com/u/okdeinfrgk)\
**Post date:** [April 7, 2025, 4:35pm UTC](https://discourse.devontechnologies.com/t/are-databases-created-within-dt4-compatible-with-dttg/82831/1 "2025-04-07T16:35:43Z")

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To my understanding, DT3 databases are not compatible with DT4. But what about the other direction DT4 databases in DTTG?

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**Author:** ![BLUEFROG](https://discourse.devontechnologies.com/user_avatar/discourse.devontechnologies.com/bluefrog/32/135_2.png) [@BLUEFROG](https://discourse.devontechnologies.com/u/BLUEFROG)\
**Post date:** [April 7, 2025, 4:38pm UTC](https://discourse.devontechnologies.com/t/are-databases-created-within-dt4-compatible-with-dttg/82831/2 "2025-04-07T16:38:07Z")

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> To my understanding, DT3 databases are not compatible with DT4.

I’m not sure where you got this idea, but that is incorrect. There is no _migration_ of databases between 3 and 4. And except for audit-proof databases, there is no problem with DEVONthink 4 databases in DEVONthink To Go.

PS: Did you read this…

> [@READ ME – Running the DEVONthink 4 Trial](https://discourse.devontechnologies.com/t/read-me-running-devonthink-4-beta/82600/):
>
> Read this if you want to run a trial of DEVONthink 4… Firstly… DEVONthink 3 and 4 should not be available to run on the same account, on the same Mac. Optimally, DEVONthink 4 should be installed on a separate macOS user account in its own ~/Applications directory to isolate it from other user accounts. However, if you want to run DEVONthink 4 and use it with your DEVONthink 3 databases, you need to make sure version 3 can’t be launched. In the Finder, locate the DEVONthink 3 application. Con…

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**Author:** ![okdeinfrgk](https://discourse.devontechnologies.com/letter_avatar_proxy/v4/letter/o/dfb087/32.png) [@okdeinfrgk](https://discourse.devontechnologies.com/u/okdeinfrgk)\
**Post date:** [April 7, 2025, 4:39pm UTC](https://discourse.devontechnologies.com/t/are-databases-created-within-dt4-compatible-with-dttg/82831/3 "2025-04-07T16:39:52Z")

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Thanks! I solely derived / assumed it from this info, somehow:

> [@READ ME – Running the DEVONthink 4 Beta](https://discourse.devontechnologies.com/t/read-me-running-the-devonthink-4-beta/82600/1):
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> However, if you want to run DEVONthink 4 and use it with your DEVONthink 3 databases, you need to make sure version 3 can’t be launched.

But glad my assumption is wrong.

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**Author:** ![BLUEFROG](https://discourse.devontechnologies.com/user_avatar/discourse.devontechnologies.com/bluefrog/32/135_2.png) [@BLUEFROG](https://discourse.devontechnologies.com/u/BLUEFROG)\
**Post date:** [April 7, 2025, 4:41pm UTC](https://discourse.devontechnologies.com/t/are-databases-created-within-dt4-compatible-with-dttg/82831/4 "2025-04-07T16:41:23Z")

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You’re welcome and the admonition is to alleviate unexpected behavior from having two versions of the same app.