Add totals and an at-a-glance list to the card

README.md

@@ -17,11 +17,24 @@ viewer: false
 
 Unmodified copies of public EEG motor imagery datasets in the [MOABB](https://moabb.neurotechx.com) cache layout. Files extracted from an upstream archive keep their bytes; Weibo2014's also take the names MOABB gives them. Zhou2016's saved Zenodo record is the one generated file; see its section.
 
+**29 datasets · 815 subjects · 1,891 sessions · 633 GB in 4,051 files · 10 original hosts**
+
+- [At a glance](#at-a-glance)
 - [Datasets](#datasets)
 - [Verification](#verification)
 - [Loading](#loading): [BNCI2014_001](#bnci2014_001) · [BNCI2014_002](#bnci2014_002) · [BNCI2014_004](#bnci2014_004) · [BNCI2015_001](#bnci2015_001) · [Beetl2021_A](#beetl2021_a) · [Brandl2020](#brandl2020) · [Cho2017](#cho2017) · [Dreyer2023](#dreyer2023) · [Farabbi2020](#farabbi2020) · [GrosseWentrup2009](#grossewentrup2009) · [GuttmannFlury2025_MI](#guttmannflury2025_mi) · [Jia2019](#jia2019) · [Kaya2018](#kaya2018) · [Kumar2024](#kumar2024) · [Lee2019_MI](#lee2019_mi) · [Leeuwis2021](#leeuwis2021) · [Liu2024](#liu2024) · [Pan2023](#pan2023) · [Pan2025](#pan2025) · [PhysionetMI](#physionetmi) · [Rozado2015](#rozado2015) · [Shin2022](#shin2022) · [Stieger2021](#stieger2021) · [Vagaja2023](#vagaja2023) · [Wang2025](#wang2025) · [Weibo2014](#weibo2014) · [Yang2025](#yang2025) · [Zhou2016](#zhou2016) · [Zhou2020](#zhou2020)
 - [Citation](#citation)
 
+## At a glance
+
+- **60%** of the bytes are one dataset: Stieger2021 is 377 GB and holds 62 of the 815 subjects (8%).
+- **25 GB** holds 449 subjects (55%), across the 15 datasets that take under 0.1 GB per subject: BNCI2014_001, BNCI2014_002, BNCI2014_004, Dreyer2023, Jia2019, Kaya2018, Leeuwis2021, Liu2024, Pan2023, Pan2025, PhysionetMI, Rozado2015, Shin2022, Vagaja2023 and Zhou2016.
+- **5 datasets** do not allow modified copies to be shared: BNCI2014_001, BNCI2014_002 and BNCI2014_004 (CC BY-ND 4.0; 001 and 004 are BCI Competition IV data sets 2a and 2b), and BNCI2015_001 and Brandl2020 (CC BY-NC-ND 4.0). A filtered or epoched copy of them may not be distributed. The other 24 allow it, with attribution (CC BY 4.0, ODC-By 1.0) or without conditions (CC0 1.0).
+- **7 datasets** keep the names MOABB caches them under, mostly their host's numeric file IDs with no extension: Jia2019, Kumar2024, Leeuwis2021, Liu2024, Pan2023, Pan2025 and Shin2022, 303 files in all. Searching the Files tab for an upstream file name will not find them.
+- **10 hosts** served the originals: BNCI Horizon, Zenodo, figshare, Harvard Dataverse, DataverseNL, GigaDB, OSF, PhysioNet, DepositOnce and Hugging Face. Files were checked against MD5, SHA-1, SHA-256, CRC-32 or S3 ETag checksums; see [Verification](#verification).
+- **3 to 128** EEG channels, from BNCI2014_004 to GrosseWentrup2009, sampled at 160 Hz (PhysionetMI) to 1000 Hz, across the 24 datasets the verification loaded. Recordings come in at least eight formats: MAT, EDF, BDF, EEGLAB, BrainVision, XDF, NumPy and CSV.
+- **9 of 106** motor imagery datasets in MOABB could not be fetched by a script on 7 Oct 2026: a 404, four Mendeley 403s, two licenses that must be accepted in code, a Harvard Dataverse 400 and a loader error. None of them is in this mirror.
+
 ## Datasets
 
 | # | Dataset | Subjects | Sessions | Size | Source | License |