An sst file extension is related to Bitcoin Core and used for its index related files.
SST file extension - Bitcoin Core index
What is sst file? How to open sst files?
File type specification:
The sst file extension is associated with the Bitcoin Core a default client for Bitcoin free peer-to-peer payment service, available for Microsoft Windows, Mac OS and Linux. The sst file stores some kind of data related to Bitcoin Core index.
The sst files are stored in Bitcon data directory:
C:\Users\"user"\AppData\Roaming\Bitcoin\blocks\
At first start of Bitcoin app you will be prompted to set the place of Bitcoin data folder. Bitcon data folder can take about 20 GB of storage space.
If you need to create new Bitcoin data folder later: create a new folder on your hard drive, open command line, go to the folder where is Bitcoin Core installed:
C:\Program Files\Bitcoin
and type:
bitcoin-qt.exe --datadir=path\to\new\location
for example:
bitcoin-qt.exe --datadir=D:\mydata\bitcoindata
The default software associated to open sst file:
Company or developer:
Bitcoin Project
Bitcoin Core is default Bitcoin client that builds the backbone of the network available for Microsoft Windows, Apple Mac OS X and Linux operating systems. It offers the highest levels of security, privacy, and stability.
List of recommended software applications associated to the .sst file extension
Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open sst file, edit sst file, convert sst file, view sst file, play sst file etc. (if exist software for corresponding action in File-Extensions.org's database).
Unspecified and all other actions for computer programs working with sst file - Bitcoin Core index
Click on the software link for more information about Bitcoin Core. Bitcoin Core uses sst file type for its internal purposes and/or also by different way than common edit or open file actions (eg. to install/execute/support an application itself, to store application or user data, configure program etc.).